Note: Not applicable to automobile tires. Description 1.Automatic Electric Ball Pump:Electric Ball Pump designs with intelligent pressure detection and stop function,just preset the correct ball PSI,press to start and it will automatically stop inflating once the preset pressure is reached. Smart and easy to use. 2.Accurate Pressure Alignment: built-in Digital Pressure Gauge and LCD Display, you can preset a very accurate PSI to inflate your ball ,and then you could get an accurate level of pressure (PSI) in balls. Makes inflating balls much easier without wasting time, you can focus, not on the ball but, on the game. 3.Fast Ball Pump-Free Your Hands and Save Your Energy:Air volume input: 4L/M, which finishes inflation of a ball in just 1-2 minutes. No need to be sweating for pushing or pulling those manual ball pumps with your hands. Saving more energy to beat your opponent 4.Portable Compact Design:Size: 6.29*1.57*1.57inch, Weight: 0.55LB, fit to in your bag, your boot or even your pocket. Allows you to take this mini pump to wherever you might need it to keep your balls inflated.With bright LED lights and backlight LCD display make it convenient to use the ball pump at night or in dark places.