1. Bluetooth receiver and transmitter adapter,2-in-1 mode can add Bluetooth functionality to your device, allowing you to enjoy wireless audio on devices that previously did not support Bluetooth(such as vintage stereo, speakers, TV, PC, or car stereo). 2. In receiver mode(Rx), it can receive audio from a phone/tablet and play music on a wired speaker/stereo. In transmitter mode(Tx), the Bluetooth adapter is plugged into non-Bluetooth devices such as TV/PC/MP3/MP4 players and transmits audio to Bluetooth headphones/speakers 3. Built-in 250mAh battery,long standby,use the Type-c cable to charging 4. Suppoort TF Card play,insert a TF card into the Bluetooth audio receiver, and then just turn on the speakers and let the music flow. Plug and play, easier to use.(TF card not included)<br><br>Colour:White Material:Plastic+Aluminum Alloy<br><br>Package Contents: 1 * Bluetooth receiver transmitter 1 * USB charging cable 1 * 3.5mm audio cable<br><br>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.