Enjoy Wireless Streaming Music - This car Bluetooth receiver can be connected to non-Bluetooth car audio systems, home stereos, old speakers, wired headphones via the 3.5mm AUX adapter; And equipped with a Bluetooth 5.1 chip for stable connection / fast transmission / wide signal range. Just pair it with your phone and start listening to your favorite music! Up to 20 hours Battery Life - The working time of this aux Bluetooth receiver is up to 20 hours when making calls or playing music. And it takes only 1 hours to fully charge the device by using a Type-C fast charging cable (Included in the package). Connection 2 Devices at the Same Time - The portable Bluetooth stereo adapter can be paired with 2 devices at the same time. You can enjoy your music and never worry about missing any calls. Hands-free - A built-in microphone and one "MFB" button to answer / redial / hang up / reject calls, help you make hands-free calls. And the Bluetooth audio adapter supports broadcasting voice notification from existed navigation App. You don't have to look down the phone on the move. Make sure you drive safely! 1. BT Version:JL 5.1 2. Pair with mobile phone/MP3/tablet, etc and turn your old car stereo/home stereo/3.5mm wired headphones into wireless. 3. Support TF card to play MP3/FLAC format music. 4. Build-in Type-C charging port. 5. Lithium battery capacity:300mAh 6. Compatible with ios and Android devices Colour:White Material:ABS Package Contents: 1 * Wireless AUX Adapter 1 * Audio Adapter 1 * USB Cable 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.