"GE mySelectSmart Automatic Light-Sensing Wireless Lighting Control Conveniently control indoor plug-in, holiday and seasonal lighting with this wireless light-sensing transmitter and plug-in receiver. Transmitter will automatically turn on lights at dusk and features 4 off options to choose from: 2 hour / 5 hour /8 hour countdown or off at dawn. REQUIRES 1 CR2032 battery (included). Transmitter mounts in any location with a simple built-in keyhole mount (hardware NOT included). Should be ideally placed near a window. Can be mounted up to 150ft. from the receiver. 1 polarized outlet and plugs-in to a standard in-wall receptacle without blocking access to the lower outletpatible with LED, CFL, & Incandescent lighting. Can be paired with additional receivers, transmitters or other mySelectSmart Lighting Controls. "