Zxlight&reg;18w Mircowave Motion Sensor Led Ceiling Light Body Automatic Light Switch Ac 220v[energy Class A+] (Cool White) Energy conservation, Long life, Security. Have emergency light, easy use and more safety When someone enters the detection range of the light, the microwave radar sensor works to turn the light on; when the person leaves the detection range, it automatically turns off Sensing distance: 2 -6 meters. Diameter 34cm Height:6cm