Name: Car Bluetooth audio adapter 1. Bluetooth wireless 5.1 2. Automatically connect the paired Bluetooth device when it is turned on 3. No device connection for 5 minutes, automatic shutdown 4. Built-in 240MA rechargeable battery, environmental protection and energy saving. 5. The playing time of fully music is about 9 hours 6. Support Bluetooth stereo music DSP technology 7. AUX audio output 8. Voice announces the caller number Color: black Material: ABS Package Contents: 1 x 3.5mm connector 1 x 3.5mm audio cable 1 x Car bluetooth adapter 1 x English manual 1 x 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.