Power On: Long touch the power symbol for 2 seconds to power on, the blue light (blue power symbol) is always on for 3 seconds, and then turns off to enter the standby state In the standby state, the hand senses bubbles, and the blue light (blue power symbol) flashes when spraying liquid. Shut Down: Touch the power symbol for 2 seconds to shut down, and the red light (red power symbol) flashes for 2 seconds to turn off.