1[Fast Heating] Car engine heater with built in thermostat, heating time is only 30 minutes, reducing fuel consumption and prolonging the life of the engine. 2[Safety Protection] This car engine heater has double overheating protection, the heater is very safe to realize parking the car closer to home and office. 3[Practical And Durable] Aluminum alloy casing, long service life, no less than 2000 hours. Even in the cold of ?30C or more, you can travel at will. 4[Application] Engine preheater for cars, trucks, buses, RVs, campers, caravans, construction vehicles, boats and other vehicles with 1.8 liter displacement. 5[Multi Function] It can provide heat source for the car, improve the temperature of the car, preheat the engine coolant and avoid low temperature wear of the engine. 6[Professional Part] Universal air parking heater, can improve the car temperature, conducive to the car interior thawing, car start, car glass fogging frost.