RADIO POWR SAVRâ„¢ wireless daylight sensor is a battery powered sensor that automatically controls lights via RF communication to compatible dimming or switching devices. Wirelessly transmits the light level to the associated dimming or switching devices that automatically control the lights to balance light level in the space. Photopic response matches human eye. Designed to give a linear response to changes in viewed light level. One sensor is capable of switching, stepped dimming and continuous dimming of multiple zones. Front accessible test buttons make setup easy. Capable of override for a maximum of 2 hours.