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 , 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.