An economical pool filter time clock automating your pool's filter operation pays for itself in energy savings in the first month. Except for during times of heavy use, most pools only need to filter for 12 hours per day. Pool timers save you money on electricity and chemicals. This rugged, weather proof timer has up to 50 settings to allow you to turn your pump on and off whenever you desire. The unit is easy to program with clear instructions.These Portable Outdoor Timers are specially designed to control the filter pump of a portable pool or spa, but they can also be used to turn ON and OFF (in off-season) outdoor decoration, engine block heaters and other appliances, indoors or outdoors.