Bluetooth Audio Receiver: Upgrade your non-Bluetooth speakers/home stereo/car stereo with this bluetooth adapter so you can enjoy wireless audio from your smartphone, tablet or laptop. Easy to set up and connect in seconds.<br> interfaces and compatibility: support for optical fiber/RCA/3.5mm/AUX/U disk audio, to meet the needs of audio interface devices<br> Easy Setup: This bluetooth receiver can be paired with your phone or tablet, and connected to non-bluetooth speakers/home stereo/car stereo via audio cable, then enjoy wireless music. Simple plug and play.<br> Volume Control and Visual Indicators: Turn the knob to adjust the volume, press the "Less than" key to adjust the music track. Readable screen tells you mode and volume so you're never confused<br> There is no battery in the Bluetooth adapter. Please connect the power supply before use.<br> size: 90 x 77 x 30mm<br> Material: ABS<br> colour: black<br> Package Contents:<br> 1 x host<br> 1 x 3.5 audio cable<br> 1 x RCA connector<br> 1 x Type-C power cord<br> Only the above package content, other products are not included.<br> 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.