Preset Modes: The electric ball pump is an upgraded version that has been designed with preset ball modes: basketball, soccer, football and volleyball. You dont have to preset the pressure anymore; Just one-key select the ball mode you need and inflatethat is more convenient to use. Also, we do reserve the custom mode that you can preset manually to inflate other balls. New Function--Deflation & More Accurate Pressure Detection: This air pump for ball detects pressure more accurately than the old version. Not only can it inflate the sport balls, but also it has deflating function that can help deflate to proper pressureif the ball pressure was too high. (Press and hold the "-" button to deflating) Twice Faster & More PowerfulEquipped with upgraded motor, the inflates twice faster than the old version that will fully inflates a ball within one minute. Additionally, it can inflates higher pressure up to , while the old version is onlywhich is more powerful that can work for other balls with higher pressure requirement. Automatic Ball Pump: This is an automatic ball pump, which is different from the push-pull air pumps that are inefficient and exhausting. It inflates and stop automatically. Ultra easy to use, even for children. Also, it brings great help for coaches,whom have to inflate tons of equipment before the practice session, to save their time and energy.