This PCP air compressor is designed with a built-in fan and adapter, and it can be powered directly by a 12V car battery or a 110V/220V home socket. Equipped with an automatic shut off, you can preset the pressure and the PCP air compressor will stop automatically when the set pressure is reached. The maximum pressure is 4500 psi/30 Mpa/300 Bar, perfectly suitable for air rifles, paintball tanks, and mini diving bottles.