PORTABLE & Copmact SIZE]:The small size (7.28 x 5.7 x 2.56 inches) of our tire inflator allows it to fit snugly in the back seat. Rated for a maximum fill pressure of 150 PSI, it plugs into your vehicle's 12-volt cigarette lighter socket and is long enough to easily reach all four tires. Preset and Auto Off: Functionally, the unit is programmable. You can press "+" or "-" to set the desired pressure unit, and when the preset value is reached, the compressor will automatically shut off. *Note*: Suitable for car tires up to 195/65/R15, not for large trucks, buses, vans, and RVs. LED & DIGITAL SCREENPortable air pump is equipped with a digital screen and built-in LED lights. The bright display makes it easy to read your measurements - no matter what kind of lighting you have. You can press the "R" key to switch between units in kg/cm3, bar, k Pa or psi. FAST INFLATION AND WIDE APPLICATION:Fill a car tire from 0PSI to 36PSI in 5-10 minutes, or 29-36PSI in 1 minute. Equipped with 3 extra nozzles and extra fuses to meet your different needs. Can be used for cars, motorcycles, bicycles, inflatable boats, balls and other different equipment.