Battery backup - batteries included.Maximum ON time: 6 days, 23 hours, 59 minutes. Minimum ON time: 1 minute.Capacity: 15 amps Resistive (1875 Watts), 500 Watts Tungsten. 15 amps Inductive, 1/3 H.P - 120 Volts, 60 Hz.Controls all types of loads, such as lamps (including fluorescent), TV's, stereos and appliances, providing up to 14 ON / 14 OFF settings per day or 98 ON / 98 Off settings in a week. It plugs directly into wall outlet (3-prong grounded plug and receptacle). Easy-to-set hand-held programming , LCD digital clock and readout with "to-the-minute" setting for accuracy. Features a manual override.