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
It would be necessary to connect a limiting resistor in series with the lamp.
须用一个限流电阻同灯泡串联起来。
3
Dimensions between neon lamp and resistor is normally 4mm min.