... 3. Pir sensors 4.Certificate:CE,ROHS 1.Auto switch on when detecting people movement2.Voltage:6V.(4AAA Battery)3.Pir ... ) Adjustable brightness ( From bright to dark)3) Auto switching on when detecting people coming4) Super sensitivity within 3meter distance5) Wireless ... to install, can be used in bedroom, washing room, and on refrigerator, washer, iron door, exhaust fan and anywhere you need light ...