AG SOUTH 5275088 High Flo 12 Volt Diaphragm Sprayer Pump 45 PSI Max 3.8 GPM 11 Amps Draw Roundup Ready No Flammable Or Combustible Fluids with Internal Fan Cools Pump Up To 50% During Operations Heavy duty fan to efficiently cool pump motor Motor windings have been increased to help dissipate heat Each pump has an internal fan which cools the pump during operation by up to 50 percent