FF Series commercial auto-off timer is designed to replace any standard wall switch - single or multi-gang. This series of energy-efficient mechanical timers do not require electricity to operate. In addition, they automatically limit the ON times for fans, lighting, motors, heaters and other energy consuming loads. Rugged time dial plate easily withstands the abuse encountered in commercial environments. Commercial “brushed metal” (plastic construction) look meets NEC requirements. Time saving up front terminal connection with teeter-type terminals. Press-on knob design ensures quick and easy installation. CFL compatible.