This heavy duty, grounded timer is ideal for automatically controlling personal computers, heaters, heavy-duty appliances and HID lighting fixtures. It plugs directly into a wall outlet. Featuring 3 ON/3 OFF settings per day, 3-prong grounded plug and receptacle and a manual override on/off switch. TN311C - 1750W/120VAC/15 Amp/1 HP. HB111C Receptacle.