About this item 2022 new upgraded. Need to install 5/8"(16 mm) inner diameter water hose(which is not included). High Output: 8500 BTU. It is small and easy to install. Enjoy the warmth and environmental protection in the cold winter. Temperature of heating depends on the water temperature of your vehicle. The heater is widely used to increase the temperature of the car, warm the feet, and defrost and remove fog. Your satisfaction is our TOP Priority! We will answer you within 12 hours!