1.On/Off
Plug to the power socket, the lamp buzzer beeps once(It means being connected to power only, the lamp is not in running state). Press On/Off key, the buzzer beeps once and the lamp is in stand-by state; If you press the On/Off key when it is in running,the buzzer will beeps once continuously and the lamp is shut off. 
2.Timing Key
You can choose sterilizing time according to specific requirement(15 minutes,30 minutes,60 minutes,90 minutes,keep lighting on),the buzzer beeps once for each choice on the timing key.after waiting for 10 seconds delay.
3.Running State
The lamp will count down 10 seconds after starting to work,the buzzer will beep once every second to warn the person to leave the room quickly.In 10 seconds,the lamp starts to radiate UV light and count the sterilization time.
4.Wireless Remote Control
The usage of remote control is the same as the keys in the panel.