Bestway 11in x 7.5in Air Step Pump includes three different valve adaptors, allowing you to effortlessly inflate an airbed or pool. In fact the adaptors make the foot pump compatible with almost every type of inflatable. Operating the heavy duty foot pump is as simple as fitting the correct adaptor to its flexible hose, plugging it into the inflatable's valve and pumping up and down on the pedal (as if tapping your foot to the beat of a drum). This is known as the 'step and pump' technique and it's a tireless method of tackling an aired bed or pool. In addition to an inflation setting, the Bestway foot pump has a deflation switch to suck air out of an inflatable with speed and simplicity. The inflatable foot pump has been specially designed to provide maximum airflow.