Automatic Electric Balloon Pump: The electric balloon pump has intelligent pressure sensing and shut-off function, just preset the right psi, press to start and it will automatically stop inflating once the preset pressure is reached. Convenient and easy to use. Quick ball pump frees your hands and saves your energy: Air inlet volume: 4 l/m, which finishes inflating a ball in just 1 2 minutes away. No need to sweat to push or pull these manual push-ups with your hands. Save more energy to beat your opponent. Precise Pressure Alignment: Built-in digital pressure gauge and LCD display, you can preset a very precise psi to inflate your balloon, and then get a precise level of pressure (PSI) in the balls. Makes inflating balls much easier without wasting time, you can concentrate, not on the ball but on the game. Precise pressure alignment: built-in digital pressure gauge and LCD display, you can preset a very precise psi to inflate your balloon, and then obtain a precise level of pressure (PSI) in the balls. Makes inflating balls much easier without wasting time, you can concentrate, not on the ball but on the game. Precise pressure alignment: built-in digital pressure gauge and LCD display, you can preset a very precise psi to inflate your balloon, and then obtain a precise level of pressure (PSI) in the balls. Makes inflating balloons much easier without wasting time, you can concentrate, not on the ball but on the game.