Powerful Air Compressor: Built-in 4000mah rechargeable large capacity battery, the tire inflator portable air compressor does not need external power supply during work. With 2 times faster inflation speed than other ordinary electric air pumps, +30% power, can provide up to 2 hours of continuous cordless operation. 7.4V Portable Air Pump: Powerful tire inflator with built-in high-performance chip to quickly inflate tires. It offers a maximum pressure of 150 psi and an air flow of 21 L / min. In daily situations, inflate a small car tire (25 - 36psi) in 2 minutes or fully inflate a car tire (0 - 36psi) in 5 minutes. 4 + n Smart mode: 4 preset inflation modes (bicycle, motorcycle, car and ball) for easy choice for beginners. The manual mode can also adjust the pressure value (3 - 150psi) according to the inflatable object to meet various inflation requirements. It is ideal for inflating cars, motorcycles, bicycle tires, balls. Accurate display: The car tire inflator pump is equipped