all Pioneer A series amplifier repair and update voltage conversion as well

Pioneer VSX-1130-K 7.2 Channel Dolby Atmos AV ReceiverWith Remote Control Excellent Condition7-channel amplifier100 watts per channel into 8 ohms (20-20,000 Hz) at 0.08% THD, with 2 channels drivenDiscrete Direct Energy amplifier design for consistent multi-channel sound qualityDolby® and DTS® surround sound decodingDolby Atmos processing for use with in-ceiling or height speakers for more enveloping surround sound; compatible with 7-channel setups4K Ultra HD upscalingMulti-Channel Acoustic Calibration Pro automatically optimizes your speakers for your room and setup (microphone included)Subwoofer EQ and Standing Wave Control help deliver accurate, even bass throughout the roomDigital and Streaming Music Options:built-in Wi-Fi for listening to music from a networked PC, free Internet radio, and online music servicesincludes support for Pandora and thousands of free Internet radio stations with vTunerSpotify Connect lets you play Spotifys streaming music library through the receiver via your smartphone or tablet (requires Spotify app and a premium subscription)built-in Bluetooth for wireless music listening with smartphones, tablets, and compatible computersApple AirPlay for streaming music from an iPhone, iPad, iPod touch or computer running iTunesDLNA-certified for streaming music with compatible devices and computersplays high-resolution digital music files via USB storage device or a networked computerPCM files up to 24-bit/192kHz resolution; DSD files up to 2.8 MHzMHL-ready HDMI input for accessing content from select Android smartphones, tablets, and Roku streaming media sticksHTC Connect™ for wireless music streaming from a compatible HTC smartphonegapless playback of digital music filesMulti-room Audio/Video:dual-room/dual-source output for audio playback from two different sources at the same time2 independent HDMI outputs for watching video content from different sources in two zones simultaneouslypowered outputs for second room allow simultaneous 5.2-channel sound in main roomAudio Performance Features:24-bit/192kHz ESS SABRE™ Premier digital-to-analog converter for exceptional sound from stereo and multichannel sourcesAdvanced Sound Retriever restores details to MP3s and other compressed digital music filesSound Retriever Air listening mode restores detail when using Bluetooth audio sources24-bit processing engine adds detail and smoothness to CD-quality audio signalsbi-amp compatible front left and right speakers by reassigning surround back/zone 2 channelsConnections:HDMI 2.0a audio/video switching: 7 in, 2 out (includes 1 front-panel input)HDCP 2.2 technology ensures compatibility with 4K Ultra HD sources and TVs (BD, DVD, SAT/CBL inputs and monitor outputs only)HDR-compatible for extended picture contrast and brightness with compatible 4K TVs and HDR-encoded content (firmware update required)component video switching: 1 incomposite video switching: 2 in, 1 outdigital audio inputs: 1 optical and 1 coaxial3 analog stereo audio inputs2 preamp outputs for powered subwoofersno phono input — to connect a turntable youll need to add a phono preampfront-panel USB input for connecting an iPod®, iPhone®, or thumb drivedirect digital connection for iPod or iPhone bypasses the devices digital-to-analog converter for better soundoutputs for 9 speakers (Front L/R, Center, Surround L/R, Surround Back L/R, Top Middle L/R)receiver can power a maximum of 7 channels at onceEthernet portIR in/outfull-sized headphone jackGeneral Features:4K/60p and 3D video pass-throughsimplified rear panel layout with clearly labeled configuration optionsdual Wi-Fi antennas for greater network rangefree iControlAV5 app for iOS® and Android™ lets you control the receiver with your smartphone or tabletAVNavigator walks you through connections and setup using your computer, tablet, or smartphone (requires a network connection to your receiver)energy-saving ECO ModeHDMI standby pass-through allows HDMI switching without powering up receiverAM/FM tuner with 63 presets Normal 0 false false false EN-US X-NONE X-NONE Attention: We Ship UPS, USPS and depending on the item. Please, always view pics closely before bidding ! We are a reputable Stereo Store with 49 years experience. Professionally Serviced, Cleaned and Tested by our Technicians. All items are shipped fully Insured. World Class packaging guaranteed to arrive as shown in the pictures. We ship to Lower 48 States only. ------------------------------------------------------------- International Shipping is available through Ebay. We will ship to the Ebay Hub in Illinois and then they repack and handle customs form and charge for their service on top of our price to ship to your country. Check the rates for your city and country.

all Pioneer A series amplifier repair and update voltage conversion as well

Pioneer Remote Controller CU-D010 fro DAT Recorder Description Good. Shipping We will ship it within 5 business days. Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. Thank you very much.

Alle Tasten wurden getestet. Mit Alkohol abgewischt und gereinigt. Nicht abgebildete Artikel sind nicht im Lieferumfang enthalten.Batterien und anderes Zubehör sind nicht im Lieferumfang enthalten. Die Kosten variieren je nach Standort. Bitte überprüfen Sie die Registerkarte „Versand“. Artikel werden nur an die eBay-Adresse des Käufers versendet. Bitte kontaktieren Sie uns, wenn Sie Fragen zum Artikel haben. Wir versenden per FedEx oder EMS. ?Internationale Käufer – Bitte beachten? Einfuhrzölle, Steuern und andere Gebühren sind nicht enthalten. Die oben genannten Kosten gehen zu Lasten des Käufers. Bitte wenden Sie sich an Ihr örtliches Zollamt, um die genaue Höhe der Zölle und Steuern zu erfahren. Bitte haben Sie im Voraus Verständnis. Diese Gebühren werden normalerweise von der ausliefernden Spedition (Versandfirma) oder bei der Abholung des Artikels erhoben – verwechseln Sie sie nicht mit zusätzlichen Versandkosten. Der Preis eines Artikels darf nicht unter dem tatsächlichen Preis liegen oder als Geschenk aufgeführt werden.

DescriptionFor PartsPlease check the status description. PolicyPaymentPlease pay within 5 days after auction is finished.About UsAll of our goods are genuine articles. Moreover, we sell honestly. Please contact me, if you have your question.International Buyers - Please Note:Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.

Wegen Hobby aufgabe verkaufe ich mein Pioneer D-05 DAT-Recorder Die Fernbedienung ist Original und Neu !! Der Pioneer D-05 DAT-Recorder funktioniert einwandfrei, Nichtraucherhaushalt keine Tierhaltung ! Anschlüsse Analog-Eingangs-/Ausgangsbuchsen: Line-Eingang: Cinchsteckerbuchsen, Referenzeingangspegel 500 mV (EIngangsimpedanz: 27 kOhm) Line-Ausgang: Cinchsteckerbuchsen, Referenzausgangspegel 500 mV (Ausgangsimpedanz: 1 kOhm) Kopfhörerausgang: Stereostandardbuchse, 6 mm Digital-Eingangs-/Ausgangsbuchsen: Koaxial-Eingangsbuchse: Cinchsteckerbuchse, 0,5 Vs-s (Eingangsimpedanz 75 Ohm) Koaxial-Ausgangsbuchse: Cinchsteckerbuchse, 0,5 Vs-s (Ausgangsimpedanz 75 Ohm) Lichtwellenleiter-Eingangsbuchse (Toslink) Technische Daten Bandgeschwindigkeit: High Sampling 16,3 mm/s, SP: 8,15 mm/s, LP 4,075 mm/s Aufnahmezeit bei o.g. Bandgeschwindigkeiten: 60 Min max., 120 Min max., 240 Min max. Anzahl der Kanäle: 2 Kanäle Stereo Anzahl der Quantisierungsbits: 16 Bits linear, 12 Bits nichtlinear Abtastfrequenzen: 48 kHz, 44,1 kHz, 96 kHz, 32 kHz Fehlerkorrekturmethode: Doppel-Codierung, Reed-Solomen-Code Modulationssystem: 8-10-Umwandlung Emphasis: Aufnahme: fest bei OFF, Wiedergabe: automatische Umschaltung Tonkopf: Sendust-Kopf im AT-Aufbau Aufnahme-/Wiedergabefrequenzgang: Wide: 5-44kHz, SP: 5-22, LP: 5-14,5 Störspannungsabstand: über 91 dB Gesamtklirrfaktor: unter 0,0045% (1 kHz) Besondere Ausstattungen Breitbereichsmodus (High Sampling) Langspielmodus (LP) Zeichengruppe-Funktion AI-Suche mit hoher Geschwindigkeit Programmwahl Wahl von übersprungenen Titeln und Titelsuche Direkte Titelwahl Titelwiederholung Überspringwiedergabe Neunummerierung mit TOC-Aufnahme Endmarken-Aufnahme, Endsuche, Leerabschnittsuche Zählwerk mit 8 Modi Automatische Restbandanzeige durch Banddickenberechnung Digitale Spitzenbereich-Anzeige Timer-Aufnahme/-Wiedergabe Cue/Review Stummaufnahme Display aus Ich schließe jegliche Sach­mangelhaftung aus. Die Haftung auf Schaden­ersatz wegen. Verletzungen von Gesundheit, Körper oder Leben und grob fahr­lässiger und/oder vorsätzlicher Verletzungen meiner Pflichten als Verkäufer bleibt uneinge­schränkt. Alle Daten wurden nicht auf Richtigkeit überprüft worauf Irrtümer sowie Rechtschreibfehler vorhanden sein können.

all Pioneer A series amplifier repair and update voltage conversion as well

?? Maintenance ItemsSimply cleaned.?? AccessoriesMain unit only. DescriptionAll items in my store are 100% authentic.Please contact me if you have any questions.ShippingWe always send the item with a tracking number. So please place an order without any concern on delivery. You can always track the delivery status.Shipping is only available to the address registered in eBay. If you want us to send another address, please change your address on eBay and then place an order.FedEx or DHL or Japan Post serviceShip our within 10 business days once receive paymentAbout Importers ObligationImport duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. These charges are normally collected by the delivering freight company or when you pick the item up -do not confuse them for additional shipping charges.We do not mark merchandise values below value or mark items as gifts - US and International government regulations prohibit such behavior.Thank you for your understanding.KJ

all Pioneer A series amplifier repair and update voltage conversion as well

Pioneer VSX-1130-K 7.2 Channel Dolby Atmos AV ReceiverWith Remote Control Excellent Condition7-channel amplifier100 watts per channel into 8 ohms (20-20,000 Hz) at 0.08% THD, with 2 channels drivenDiscrete Direct Energy amplifier design for consistent multi-channel sound qualityDolby® and DTS® surround sound decodingDolby Atmos processing for use with in-ceiling or height speakers for more enveloping surround sound; compatible with 7-channel setups4K Ultra HD upscalingMulti-Channel Acoustic Calibration Pro automatically optimizes your speakers for your room and setup (microphone included)Subwoofer EQ and Standing Wave Control help deliver accurate, even bass throughout the roomDigital and Streaming Music Options:built-in Wi-Fi for listening to music from a networked PC, free Internet radio, and online music servicesincludes support for Pandora and thousands of free Internet radio stations with vTunerSpotify Connect lets you play Spotifys streaming music library through the receiver via your smartphone or tablet (requires Spotify app and a premium subscription)built-in Bluetooth for wireless music listening with smartphones, tablets, and compatible computersApple AirPlay for streaming music from an iPhone, iPad, iPod touch or computer running iTunesDLNA-certified for streaming music with compatible devices and computersplays high-resolution digital music files via USB storage device or a networked computerPCM files up to 24-bit/192kHz resolution; DSD files up to 2.8 MHzMHL-ready HDMI input for accessing content from select Android smartphones, tablets, and Roku streaming media sticksHTC Connect™ for wireless music streaming from a compatible HTC smartphonegapless playback of digital music filesMulti-room Audio/Video:dual-room/dual-source output for audio playback from two different sources at the same time2 independent HDMI outputs for watching video content from different sources in two zones simultaneouslypowered outputs for second room allow simultaneous 5.2-channel sound in main roomAudio Performance Features:24-bit/192kHz ESS SABRE™ Premier digital-to-analog converter for exceptional sound from stereo and multichannel sourcesAdvanced Sound Retriever restores details to MP3s and other compressed digital music filesSound Retriever Air listening mode restores detail when using Bluetooth audio sources24-bit processing engine adds detail and smoothness to CD-quality audio signalsbi-amp compatible front left and right speakers by reassigning surround back/zone 2 channelsConnections:HDMI 2.0a audio/video switching: 7 in, 2 out (includes 1 front-panel input)HDCP 2.2 technology ensures compatibility with 4K Ultra HD sources and TVs (BD, DVD, SAT/CBL inputs and monitor outputs only)HDR-compatible for extended picture contrast and brightness with compatible 4K TVs and HDR-encoded content (firmware update required)component video switching: 1 incomposite video switching: 2 in, 1 outdigital audio inputs: 1 optical and 1 coaxial3 analog stereo audio inputs2 preamp outputs for powered subwoofersno phono input — to connect a turntable youll need to add a phono preampfront-panel USB input for connecting an iPod®, iPhone®, or thumb drivedirect digital connection for iPod or iPhone bypasses the devices digital-to-analog converter for better soundoutputs for 9 speakers (Front L/R, Center, Surround L/R, Surround Back L/R, Top Middle L/R)receiver can power a maximum of 7 channels at onceEthernet portIR in/outfull-sized headphone jackGeneral Features:4K/60p and 3D video pass-throughsimplified rear panel layout with clearly labeled configuration optionsdual Wi-Fi antennas for greater network rangefree iControlAV5 app for iOS® and Android™ lets you control the receiver with your smartphone or tabletAVNavigator walks you through connections and setup using your computer, tablet, or smartphone (requires a network connection to your receiver)energy-saving ECO ModeHDMI standby pass-through allows HDMI switching without powering up receiverAM/FM tuner with 63 presets Normal 0 false false false EN-US X-NONE X-NONE Attention: We Ship UPS, USPS and depending on the item. Please, always view pics closely before bidding ! We are a reputable Stereo Store with 49 years experience. Professionally Serviced, Cleaned and Tested by our Technicians. All items are shipped fully Insured. World Class packaging guaranteed to arrive as shown in the pictures. We ship to Lower 48 States only. ------------------------------------------------------------- International Shipping is available through Ebay. We will ship to the Ebay Hub in Illinois and then they repack and handle customs form and charge for their service on top of our price to ship to your country. Check the rates for your city and country.

Condition DescriptionCondition:[ Excellent ] ****** Pioneer D-05 DAT Deck Brand : Pioneer Size Height : 15.00 cm Width : 38.00 cm Depth : 45.00 cm Weight : 6.26 kg Size when packed. Please note that this is not the size of the product itself. The product in the image is a sample image. Please note that the product in the image is different from the actual product you will receive. ****** Slightly scratched or dirty See the pictures for more details. If you have any question about the condition, accessories, or anything about the product, Please feel free to message us. We are glad to answer all your concerns. Shipping We attach the tracking number to all items. The shipping status sometimes takes some time to be reflected on the website. Please buy it now without worrying. We send a item by FedEx, EMS(Express Airmail Service by Japan Post), or DHL. ~Caustions~ Shipping is only available to the address registered in ebay. Please note that any address not registered in ebay is not acceptable to ship. Policy PaymentWe accept ebay managed payment. Our policy is immediate pay.ReturnsCustomer service and satisfaction are very important to us. We have an unconditional return policy if notified within 30 days of the receipt of the item. All returned items must be the original condition. Please contact us first for return before you ship it back to us.International BuyersPlease Note : Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying.About UsThank you for visiting our shop. In Japan, we have a custom of using things with care, so there are many items in good condition, even used ones. We hope to sell Hospitality : OMOTENASHI together with the items. If you are looking for an item that we do not have, please do not hesitate to contact us. If it is a Japanese item, we will find it for you. Our manager has lived in Mexico, so we are happy to contact with Spanish-speaking customers. We sincerely hope you will find good products!

All buttons have been tested. Wiped and cleaned with alcohol. Items not pictured are not included.Batteries and other accessories are not included. Costs vary depending on your location. Please check the Shipping tab. Items will only be shipped to the purchasers eBay address. Please contact us if you have any questions about the item. We ship via FedEx or EMS. ?International Buyers - Please Note? Import duties, taxes, and other fees are not included. The above costs are the responsibility of the purchaser. Please contact your local customs office for detailed amounts of duties and taxes. Please understand in advance. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges. The price of an item cannot be listed lower than the actual price or listed as a gift.

Repair your Television with this working Internal Cable! Listing Store Feedback About Follow Contact Better for The Planet Easy on The Wallet Great for Your Soul Because your TV is a terrible thing to waste. Source TVPIONEER PRO-607PU 60 TV TELEVISION Cable InformationInternal Cable WireTV CompatibilityMay Be Compatible With Some Other Models.May Be Compatible With Other Brands. Grid (if shown) in images is approx. one inch by one inch (1 x 1 square). My MissionI empower individuals and shops around the world to repair their broken electronics instead of replacing them by providing hard to find parts from surplus devices I tested and disassembled. Together we can help protect our environment from a waste of electronics. Simply by fixing what is broken. SATISFACTION GUARANTEED!Item arrives in 100% working order. Double checked by our technician to be in proper order. Take A LookPictures are of actual Internal CableEXPRESS PROCESSINGFast Shipping with Tracking! Shipping InformationWe understand you need your Internal Cable right away and will ship it quickly once we have received your payment. Most orders ship out the same day! Delivery time provided is simply an estimate based on the location and the shipping service selected. Delivery times may vary, especially during peak periods. Absolutely everything that you will receive is pictured in the listing. You will not receive any additional items, components, or instructions with your package.Return InformationSorry, No Returns. We cannot be responsible for accidentally ordered items.Customer SupportOur goal at Dells Angels is to help you bring your device back to life by providing quality replacement parts for self-repair. Our friendly staff are eager to assist you in any way we can! If you have any questions or concerns, please contact us via eBay messages. Please allow us to resolve any issues before opening disputes or leaving feedback. Compatibility of any product with your device or system and safety procedures exercised during installation are the buyers responsibility. Our sole and exclusive maximum liability arising from any product sold shall be the price of the product ordered. 1438203106@1067/L60D 333.354 0x4 #I:10028925Source TV PIONEER PRO-607PU 60 TV TELEVISION - - Cable Information Internal Cable Wire - - TV Compatibility May Be Compatible With Some Other Models. - May Be Compatible With Other Brands. - -

all Pioneer A series amplifier repair and update voltage conversion as well

Pioneer D-05 Digital Audio Band Kassette Deck Dat 2-channel Stereo Von JapanDas Datenblatt dieses Produkts wurde ursprünglich auf Englisch verfasst. Unten finden Sie eine automatische Übersetzung ins Deutsche. Sollten Sie irgendwelche Fragen haben, kontaktieren Sie uns.  href=https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css> Pioneer D-05 Digital Audio Tape Cassette Deck Dat 2-Kanal-Stereo aus Japan  Beschreibung Pioneer D-05 Digital Audio Tape Cassette Deck Dat 2-Kanal-Stereo aus Japan?Hinweis nur für eingeschaltete Produkte. Produkte, die sich nicht einschalten lassen, sind nicht berechtigt.?  Die Stromversorgung für dieses Produkt ist AC100V 50/60Hz.In einigen Ländern ist möglicherweise ein Transformator erforderlich.Bitte bereiten Sie den Transformator kaufseitig vor. Steckdosenspezifikationen ?A-TypWenn es sich vom A-Typ unterscheidet, ist ein Konverter erforderlich.     Sie in anderen Bereichen als 100 V.Wenn Sie den von mir verkauften Transformator verwenden, können Sie ihn in anderen Bereichen als 100 V verwenden.eBay.comhttps://www.ebay.com/itm/373547463184Ebay UKhttps://www.ebay.com/itm/373547520813eBay.euhttps://www.ebay.com/itm/373547520926eBay.auhttps://www.ebay.com/itm/373547520958Wir verkaufen auch außerhalb von eBay.com.Bitte kontaktieren Sie uns, wenn Sie einen Kauf tätigen möchten.Wenn Sie weitere Fragen haben, kontaktieren Sie mich bitte.* In einigen Gebieten ist dies möglicherweise nicht möglichBitte überlegen Sie sorgfältig.Zahlung ??Wir akzeptieren nur Zahlungen per PayPal.??Bitte zahlen Sie innerhalb ??3 Tage nach Auktionsende. Versand Kostenloser VersandVersand per Express-EMS, DHL oder FedExWir liefern mit der schnellsten Versandart.Versand mit Schadens-/VerlustversicherungMit einer Verfolgungs Nummer??(10-15 Tage in die USA) ??(10-30 Tage oder mehr in andere Länder) Verkaufsbedingungen ??[Über zurückgegebene Waren]????Rücksendungen werden nur akzeptiert, wenn der Artikel im Originalzustand war?   nicht der in der Auktion beschriebene Artikel.            [Zurückkehren]       Rücksendungen aus persönlichen Gründen werden nicht akzeptiert.    Internationale Käufer – Bitte beachten Sie: Einfuhrzölle, Steuern und Gebühren sind nicht im Artikelpreis oder den Versandkosten enthalten. Diese Gebühren liegen in der Verantwortung des Käufers. Bitte erkundigen Sie sich vor dem Bieten oder Kaufen beim Zollamt Ihres Landes, wie hoch diese zusätzlichen Kosten sein werden.  Bereitgestellt von HARUPioneer D-05 Digital Audio Tape Cassette Deck Dat 2-Kanal-Stereo aus Japan?Hinweis nur für eingeschaltete Produkte. Produkte, die sich nicht einschalten lassen, sind nicht berechtigt.?  Die Stromversorgung für dieses Produkt ist AC100V 50/60Hz.In einigen Ländern ist möglicherweise ein Transformator erforderlich.Bitte bereiten Sie den Transformator kaufseitig vor. Steckdosenspezifikationen ?A-TypWenn es sich vom A-Typ unterscheidet, ist ein Konverter erforderlich.     Sie in anderen Bereichen als 100 V.Wenn Sie den von mir verkauften Transformator verwenden, können Sie ihn in anderen Bereichen als 100 V verwenden.eBay.comhttps://www.ebay.com/itm/373547463184Ebay UKhttps://www.ebay.com/itm/373547520813eBay.euhttps://www.ebay.com/itm/373547520926eBay.auhttps://www.ebay.com/itm/373547520958Wir MPN Does not apply Brand Pioneer Model D-05 UPC Does not apply

href=https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css> Pioneer D-05 Digital Audio Tape Cassette Deck Dat 2-channel stereo From Japan Description Pioneer D-05 Digital Audio Tape Cassette Deck Dat 2-channel stereo From Japan ?Note only for products that are turned on.?????????????Products that do not turn on are not eligible? The power supply for this product is AC100V 50/60Hz.A transformer may be required in some countries.Please prepare the transformer on the purchase side. Outlet specifications??A typeIf it is different from A type, a converter is required. You in areas other than 100V.If you use the transformer I sell, you can use it in areas other than 100V.ebay.comhttp://www.ebay.com/itm/373547463184ebay.ukhttps://www.ebay.com/itm/373547520813 ebay.euhttps://www.ebay.com/itm/373547520926ebay.auhttps://www.ebay.com/itm/373547520958We also sell other than ebay.com.Please contact us if you would like to purchase.If you have any other questions, please contact me.* It may not be possible in some areasPlease consider carefully.Payment ??We accept payment by PayPal only. ??Please payment within ??3 days after the auction closed. Shipping free shippingShip by express EMS?or DHL or FedExWe will deliver by the fastest delivery method. Shipment with damage / loss insuranceWith tracking number ??(10-15 days to US) ??(10-30days or more to Other countries) Terms of Sale ??[About returned goods]????Returns are accepted only if the item was ? not the item described in the aution. [Return] Returned goods for personal reasons will not be accepted. International Buyers - Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. Provided by HARU