Built-in photosensitive resistor (CDS), Brightness according to ambient light, Automatic IR LED can be opened and closed, More delay infrared lamp working life.
内置光敏电阻(CDS)，根据环境光线亮度，可自动控制红外灯开启与关闭，更能延缓红外灯的工作寿命。
2
A light (diode), is on or off, at one end, and a photo-resistor at the other end registers its state.
轻型（半导体），或者是客，一头、照片登记在另一端的电阻状态。
3
If the load resistor is a light bulb, the bulb will burn at half brightness when it is first turned on.