Steps for use: 1. Connect the data cable, turn on the power, the instrument enters the standby state, and the red indicator light is on. 2. Press and hold the switch key (CENTER key) on the instrument for 3 seconds to turn on the instrument, the instrument starts to work, and the blue indicator light is always on. 3. The automatic mode is turned on by default, and the mode can be adjusted by pressing the switch button. There are 6 modes in total. 4. The "+" key is the key to increase the intensity, and the "-" key is the key to decrease the intensity. Seconds to turn on/off the pulse function, choose according to your preference. 6. Long press the power button (CENTER) of the instrument to shut down. Note: Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture. Thanks Due to manual measurement, please allow 1-2cm measurement deviation.