KORSEED New Bluetooth 5.3 Audio Receiver With AUX 3.5mm RCA Optical Jack Wireless Audio Adapter Support U-disk for TV PC Speakers Car Product Parameter: Product Name: Bluetooth Audio Receiver Output Parameter:DC 5V Bluetooth Version: V5.3+EDR Bluetooth protocol: A2DP/AVRCP Bluetooth distance: The Open area is 10 Meters Long Without Any Abstacles Interface: R/L 2 RCA/AUX/Optical Jack /U-disk Product Size:90mm(L)*77mm(W)*30mm(H) Bluetooth Mode Playback: 1. First Use a 3.5mm Audio Cable to Connect the Wireless Receiver to the Speaker.then Plug One End Ofthe Charging Cable into the Power Supply and One End Intothe Type-c Charging Port, Short Press the Spin Button for 3 Seconds to Start the Machine; 2. Findc36"in the Wireless Search of the Mobile Phone, and then Select Pairing 3. After the Mobile Phone is Successfully Paired with the Device, You Can Now Playmusic Wirelessly, and the Unit Can Control the Up and Down Music and Volume; 4. Your Phone is Paired Successfully for the First Time, and It Will Automaticallyreconnect to Your Phone the Next Time You Turn It On. U Disk Mode Playback: After Power On, Insert the U Disk into the Usb Interface, You Can Directly Play Thecontent of the U Disk, and Short Press the Previous/next Song to Select a Song.in U Disk Mode, Short Press the Conversion Key to Switch to Wireless ModeMode. (A 3.5mm Audio Cable Needs to Be Plugged in in All Modes). Feature: Wake Up The Old StereoBluetooth Adapter can be connected to the old non-Bluetooth receiver, wired retro stereo, speaker, wired headset, car stereo via the 3.5mm aux jack, it can save the costs to purchase a new receiver, giving old devices a whole new life! Enjoy Wireless Streaming MusicBluetooth receiver for home stereo features Advanced CSR 5.3 chipset to achieve faster, more stable and longer-range Bluetooth signal receive. Continue and clear HiFi music streaming creates an enjoyable listening experience. Supports U-disk Playback The Bluetooth adapter for stereo receiver is featured for the U-disk slot. You can choose either to play from your smart device or U-disk! No matter whether you are using an old speaker, vintage stereo, or wired receiver, you can easily turn the music into wireless via the 3.5 mm or RCA cables of the Bluetooth audio receiver. Easy to use Easy plug, pair & play. Plug into speakers, home stereo systems, or other car stereos via the 3.5 mm AUX or RCA cable, then pair the Bluetooth receiver with the Bluetooth audio devices such as smartphones or tablets. After that, you can enjoy the music. NOTE: This product is a receiver only, NOT a transmitter. Note: 1-Powered By USB Charging (No built-in battery ) 2-It is just abluetooth audio t receiver. Can only be used for audio transmission, so you can"'"t use it for your file transfer.