Portable and Cordless: Are you still worrying about plugging in the power cord for a traditional air pump? Since our inflator has a built-in 2000 mAh battery, it is more convenient to use it to inflate car tires without connecting to a power source. With preset pressure and automatic shutdown : Yokiss air compressors have a maximum high pressure capacity of 140 psi. There are 4 unit values: PSI, BAR, KPA, Kg/cm, you can preset the pressure before inflating the tire, and the digital inflator will automatically turn off when the required pressure is reached to prevent excessive pressure Lithium battery High performance: Built-in 2000mh high performance lithium battery. It can standby for 365 days or work continuously for 25 minutes. Four tires can be inflated at once, allowing you to easily inflate any car, bike, motorcycle tire or other smaller item in minutes. Red LED lights and hazard warning lights : Built-in high-brightness LED lights allow you to inflate and change tires at night and in other adverse conditions. It can also provide you with lighting and a distress signal in case of an external emergency. Good quality product