1. Ring design, the light turns on red when charging, and the blue light turns on after Bluetooth pairing is successful, which more intuitively reduces customer complaints about Bluetooth pairing. 2. Add voice buttons, the presses button in driving mode to activate the smart voice 3. The up/down song buttons are designed on the side of the fuselage, which is convenient for users to control the up and down song of Bluetooth music when driving. 4. Adopt the latest Bluetooth 5.0 chip, high-sensitivity microphone, noise reduction technology, the transmission distance is , and the DSP signal processing technology calls more clearly. 5. Built-in 300mA battery for battery life. 6. Add LCD display, Bluetooth status, power, volume and other content visual display. 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 TYPE-C charging 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.