How To Use It? Power On/Off Long press the button for 2 seconds to power on, the Red/Blue Indicator lights up. Long press the button for 5 seconds to power on, the Red Indicator lights up. Bluetooth Pairing After powered on, it automatically enters Bluetooth pairing mode. Place your Bluetooth headphones or earphones within 1 meter to pair. Bluetooth Disconnection After Bluetooth is paired, long press the button for 2 seconds to disconnect the current Bluetooth headphones or earphones and re-enter Bluetooth pairing mode. Play/Pause Short press the button to pause, press again to play. Clear Bluetooth History After powering off, long press the button for about 8 seconds to clear Bluetooth pairing history. The Red/Blue Indicator lights up to enter Bluetooth pairing mode. Package Contents: 1 x o Conversion Adapter Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.