Effective heating and defogging - The rear window heater for cars quickly clears fog and frost from glass, helping you arrive at your destination with clear visibility and comfortable conditions. It delivers warm air through a large outlet to heat a wide area of the cabin efficiently. Universal compatibility and vehicle protection - Suitable for trucks, vans, battery trolleys and all other types of vehicles. It preheats the engine coolant to prevent cold-start issues and can eliminate window frost for safer starting and driving. Low energy consumption and easy to use - Environmentally friendly with low emissions and low fuel consumption. Meets Euro IV engine emission requirements. Compact design and easy to install. Can use diesel as fuel. Fast heating with flexible installation - PTC ceramic heating element provides instant heating in about 5 seconds. Can be installed on the bottom of the seat, near the feet, or anywhere else in the vehicle for convenient warming. Use scenarios - Cold start in trucks, vans or battery-trolley vehicles: preheat the engine coolant to avoid cold starts and reduce frost on windows, ensuring a smooth, quick departure. - Cabin comfort during stops or loading: warm the passenger area quickly while the vehicle is idling or parked, and keep windows clear for safe operation. - Fleet and warehouse operations: keep various vehicles warm in cold environments, improving operator comfort and equipment reliability.