Built-in pressure gauge to monitor tire pressure while inflating tires keeps the car running safely and maintaining fuel efficiency Integrated cooling keeps the unit running cooler for extended unit life and reliability Rechargeable cordless design offers true portability for on the go use in homes or vehicles Extra outlet provides power to run most 12V products 230 PSI maximum pressure 12V DC adaptor for use with vehicles and 120V AC adaptor for fast and easy recharging Onboard storage for hose, adaptor, and accessories helps keep your car clean and organized Comes with two inflation nozzles and one sports ball inflation needle Please Note: Do not operate while this unit is plugged into a 120V outlet , this unit is meant to run on its own battery after the initial 4 hour charge