Features: 1. AUX Bluetooth 5.1 adapter supports AUX interface, TF card, and Bluetooth signal receiving and transmitting. 2. Receive (RX) signals and transmit (TX) modes are available. Turn TVs, phones, headphones, speakers, car stereos and more devices into Bluetooth-compatible. 3. Lossless music quality supports high-definition voice navigation broadcasting, and drive more safely. 4. Equipped with a 180mAh high-capacity battery, providing strong battery life. 5 Working mode indicator light, with clear and visible working status. Description: 1. Material: plastic 2. Color: Black 3. Battery Capacity: 180mAh 4. Bluetooth Version: 5.1 5. Battery Duration: 10 hours per charge 6. Product Size: 60.4 x 40.2 x 13.3mm 7. Transmission Distance: 10m Package Contents: 1 x Bluetooth Transmitter Receiver 1 x USB Cable 1 x English manual 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.