HOTSTART ENGINE HEATER TPS101GT10-000 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: 350 CID (5.7 L) Volts: 120v - kW: 1 - AMPS: 8.4 - 60Hz Temperature Range: ON: 100F (38C)  OFF 120F (49C)