Large Capacity Battery - The portable air compressor has a built-in rechargeable battery, which can work for a long time. The package also comes with a car interface power cord in case the battery runs out during the trip, you can also power it by connecting it to your car. This makes the car compressor the perfect emergency tool in your car trunk! Smart Preset & Auto Shutoff - The portable air compressor includes 4 smart preset modes (Cars, Motorcycles, Bicycles, Balls), 4 pressure measurement units (PSI, Bar, KPA, kg/cm²). You can set the required preset pressure value according to your needs. When the air pressure reaches the preset value, the air pump will automatically stop inflating to prevent overcharging. (The maximum pressure is 150PSI). Multiple Functions - More than just a car tire inflator. The top is equipped with an LED emergency light, which has 3 lighting modes (Always Bright/SOS/Strobe) to help in emergency situations and use at night. In addition, it is equipped with