ELECTRICAL 24 Hour Electronic Time Switches Intermatic ET100C Series electronic time switches provide the same economical dependable & uncomplicated minute programming for accurate load control & reduces energy costs. All programming & dock setting is accomplished with the use of two slide switches & four push-buttons. Up to 8 set points or events (4 ON/OFF) can be preset to automatically repeat on a daily basis. The program can be overridden at any time by placing the selector switch in the manual position. Applications and Specifications Both of these electronic time switch series come with a factory-installed industrial-grade standard "AA" alkaline battery to provide automatic carry-over for a minimum of 3 years. The battery is easy to replace in the field without removing the mechanism or wiring.