Car seat heated increasing the temperature quickly within 1min, providing cosy warmth for full back, hips and thighs. For your safety, heated seat cushion is insulation and flame-retardant protection, equipped with protection thermostat that keeps the cushion from overheated. When the temperature reaches what you chose, it will automatically stop increasing and constantly keep the temperature you want. Once the temperature gets lower, the heater will work automatically again to rise the heat up. Heated car seat cover offers an adjustable temperature feature. Simply click the button to adjust the temperature high mid low according to the interior temperature in your vehicle. Heated seat covers include 2 plastic chuck (caught in the seat back), 2 metal hooks (hitch under your car seat) to secure it to auto seat chair. Suitable for every small, compact, medium or large vehicle, suv, sedan, car, van, truck or rv with 12v/24v dc power lighter socket. (12v/24v universal). Package included 1 x car heated seat covers.