Intermatic E1020 Mechanical Timer This heavy-duty in-wall timer is ideal for turning on lights, fans, pumps, and other heavy duty loads for energy savings, security and convenience The multiprogram dial accommodates 12 ON and 12 OFF trippers The item is shipped with two ON and two OFF trippers Features an easy to use manual override (on/off toggle) Designed to mount to any standard junction box for replacing a wall switch