Electric ballon pump fill up various ballons in no time. It has two nozzles. The nozzles each has a built-in power switch. When you push it down. it will be on. When you put your hand off the nozzle, it will be off. it can be used for two person. It has also a timer to control the pumping time, so it can pump the ballon as the same size. This style air pump is very suitable for pumping all kinds of ballons.