3-prong grounded plug. Safer hook-up and operation. UL recognized component pump. Thermal overload protection prevents damage to pump from overload. Heavy duty bearings. Fits all coolers including champion coolers. Corrosion resistant shaft. Built-in barbed elbow fits 1/2 in to 5/8 pump hoses. Low level splash protection. Removeable base plate. Supplemental screen inlet. Helps keep particles out. Operates in water reservoirs of 1/2 in to 4 in Flame retardant motor housing. UL Classified. 120 VAC, 60 HZ.