How to adjust the Bluetooth headset pairing mode button type: long press the headset power on button for more than 10 seconds, the red and blue lights flash each other, and then operate the search device on the computer. Switch type: long press the multi-function button (answer key) for more than 10 seconds, the red and blue lights flash each other, and then the computer operates the search device. If not found, please operate according to the pairing instructions of the headset / speaker, Due to the different adjustment methods of some pairing modes on the market. Colour: Black Material: ABS + metal Size: 2 x 3.5cm Package Contents: 1 x Adapter Only the above package content, other products are not included. Note: Light 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.