Tork® multi-purpose timers give you a simple way to control automations for your home or office. Multiple modes, battery backup and professional-grade accuracy make this a versatile timer for many applications. Multi-purpose timer - automate a range of indoor or outdoor loads such as lights, heaters, air conditioners, water heaters, outdoor signage, sump pumps or ventilation fans Easy-to-use - the intuitive programming interface lets users set up to 20 different on/off times in increments as small as 1 min over a 24 hr period Designed for convenience - built with features such as a 7-day power outage backup, automatic daylight savings time adjustment and Noryl® plastic enclosure with locking hasp Save energy and money - time switches save time, energy and money by providing a convenient way to turn appliances or lights on and off Professional performance - E103B is compatible with incandescent, compact fluorescent and LED light bulbs and automatically detects voltage in the 120 to 277 VAC range