These Portable Two-circuit Above Ground Pool Timers incorporate a plug-in for a timed circuit (normally used for a pool pump) and a plug-in for a live circuit (typically used for a pool light). GFCI protected circuits and a three-prong grounded plug for the time switch supply are also built in. The PE1261PE features a 24 hour electronic timer specially suited for applications where equipment needs to be cycled ON and OFF up to 8 times per day. The timer offers rugged construction, resistance to surges and humidity, operates between wide temperature extremes and comes with a 5 year service life replaceable lithium battery. A light indicator illuminates when the timer is in the ON position. Select feature allows timers to be continuously ON, OFF or in Auto mode.