[Wake Up The Old Stereo] Bluetooth Adapter can be connected to the old non-Bluetooth receiver, wired retro stereo, speaker, wired headset, car stereo via the 3.5mm aux , it can save the costs to purchase a new receiver, giving old devices a whole new life! [Enjoy Wireless Streaming Music] Bluetooth receiver stereo features Advanced CSR 5.3 chipset to achieve faster, more stable and -range Bluetooth signal receive. Continue and clear HiFi music streaming creates an enjoyable 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 , 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. Product Name: Bluetooth Audio Receiver Output Parameter:DC 5V Bluetooth Version: V5.3+ Bluetooth protocol: A2DP/AVRCP Bluetooth distance: The Open area is 10 Meters Long Without Any Abstacles Interface: R/L 2 RCA/AUX/Optical /U-disk Product Size:90mm(L) x 77mm(W) x 30mm(H) Colour:black Material:ABS Package Contents: 1x Bluetooth Audio Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.