FD Series decorator auto-off timer is designed to replace any standard wall switch - single or multi-gang. This series of energy-efficient mechanical timer do not require electricity to operate. In addition, they automatically limit the ON times for fans, lighting, motors, heaters and other energy consuming loads. Supplied time dial plates are designed to fit either toggle (FF) or decorator style (FD) switch plates. Single or multi-gang with no field modifications required. Time saving up front terminal connection with teeter-type terminals. Press-on knob design ensures quick and easy installation. CFL Compatible.