Automatic electric ball pump The electric ball pump is designed with intelligent pressure detection and stop functions. Just preset the correct ball PSI and press to start. Once the preset pressure is reached, it will automatically stop inflating. Smart and easy to use. Accurate Pressure Alignment With the built-in digital pressure gauge and LCD display, you can preset a very accurate PSI to inflate the ball, and then you can get accurate ball pressure levels (PSI). Makes inflating the ball easier, no time wasted, you can focus on the game, not the ball Fast ball pump frees up your hands and saves your energy input Air volume: 4L/M, just 1- to complete the ball Inflate for 2 minutes. There's no need to break a sweat when pushing or pulling on these manual ball pumps. Save more energy to defeat your opponents Portable compact design Dimensions: 6.29*1.57*1.57 inches, Weight: 0.55 pounds, fits in your bag, boots or even pocket. Allowing you to take this mini pump anywhere you might need it to keep your balls inflated. The bright LED light and backlit LCD display make it convenient for you to use the balloon at night or in dark places. The large-capacity battery electric ball pump is equipped with a 2000mAh lithium battery, which can inflate 30 balls on a single charge. It is equipped with a Micro-USB charging cable and can be fully charged in about 120 minutes.