4500mAh Large Capacity Battery: The car air pump has 80W, 3 x 1500mAh high power battery, 35L/MIN inflation speed can quickly inflate car tires. (within 2-5 minutes). Noticed : To prolong the life of the product, please store the product fully charged and recharge the product every 2-3 months. Preset tire pressure: The Car Air Pump has the function of presetting tire pressure, setting the required tire pressure before inflating the tire. When the set tire pressure is reached, the portable compressor will automatically stop inflation, which is convenient and smart. LCD Display: The LCD display clearly shows the battery level, tire pressure and inflation unit (four inflation units PSI, BAR, KPA, KG/CM) . The car inflator is convenient to use at night, and it can also be perfectly used to help you solve problems such as tire inflation as soon as possible. Multifunctional: The portable mini compressor is equipped of 4 different inflatable accessories, which can inflate cars, motorcycles, bicycles, inflatable paddles, etc. Note: Not applicable to large trucks, buses and other large vehicles. Portable Cordless and Simple to UseThe cordless air compressor and the compactness of this compressor make it portable and easy to use. easy to operate manually. All you have to do is attach the inflation accessory to the tire, set the tire pressure and press the inflation button.