LONG RUNTIME & AUTO-OFF: After fully charging, the built-in 4000mAh large-capacity battery allows the car tire pump to refill up to 8 tires (195/65R15) from 30-36PSI. The preset function and auto-off function deliver a hands-free inflation experience. With just one press, the cordless tire inflator will easily inflate car tires, motorcycle tires, bicycle tires, balls, and more. (Note: Incompatible with heavy-duty tires, like those on offroad vehicles, RVs, trucks, and trailers.) ADVANCED TRUEGAUGE SCREEN: This battery tire inflator includes updated sensor technology, capable of collecting pressure data from tire inflators at a frequency of 200 times per second. Its valid data rate is higher than 80%, which is 60% better than the market average. Wherever you go, accurate readings help you drive safely. VERSATILE EMERGENCY TOOL: The bike pump can be used as more than an air pump; it is also a multifunctional emergency tool. The flashlight on the top has 3 modes (flashlight, SOS, and strobe) to illuminate the night for easy operation. The air compressor is equipped with USB-C and USB input/output ports, providing backup power for your phones and other electronic devices. Note: Please fully charge the Tire Inflator (using a 5V 1A battery charger) before using. 2X FASTER INFLATION & COMPACT: Weighing less than 1 pound, this portable tire inflator is easy to carry and store in any limited space, such as cars, bike racks, or backpacks. The compressor's 150 PSI maximum pressure, coupled with its 17L/min airflow, delivers 2X faster inflation. It can refill a 195/65R15 tire from 30 to 36 PSI in 1.5 minutes. EASY TO USE: You can choose 4+N smart modes (car, motorcycle, bicycle, ball, and custom) based on your various inflation needs. You can also easily choose between 4 pressure units as needed (PSI, Bar, kPa, kg/cm²). The custom mode allows you to freely preset the desired pressure value (3-150PSI) based on the inflatables you want to inflate.