HOTSTART ENGINE HEATER TPS051GT12-000 COOLANT PRE-Heater - Original - 1 Year Warranty Pre-Heat: Diesel and Gas engines, construction equipment, trucks, marine and industrial applications Heating Fluid: Engine Coolant, Water, other - No pump needed (thermosiphon principle) Engine Displacement: 150 CID (2.5L) Volts: 120v - kW: 0.5 - AMPS: 4.2 - 60Hz Temperature Range: ON: 120F (49C)  OFF 140F (60C)