Remote controlled out timer featuring (2) 3-prong grounded outlet outdoor rated countdown timer makes programming simple. The built-in photosensor activates the countdown and temporary light sources like porch lights or car headlights won\’t turn off the connected lights or cause the program to re-set. The added advantage of the wireless remote control allows for changing the program from the comfort of being inside, from 80-feet away (line of sight). Program with a wireless remote or on the unit. Choose from 7 modes: on at dusk for 2 Hr., 4 Hr., 6 Hr., 8 Hr., dusk to dawn, always on or off. Countdown timing starts at dusk for the timed duration selected. Patented Reverse ground-pin placement: When mounted to wall, unit accepts most right-angle and transformer plugs. Compatible with CFL (compact fluorescent), LED (light emitting diode), and incandescent light bulbs. Includes (1) replaceable 23AE 12V alkaline battery.