AIR PUMP: inflatables never have been more convenient, designed to provide maximum airflow and fast inflation for users to enjoy their inflatables in no time! DESIGN: the pump has a stroke volume of 0.85 L/cycle and features a large air chamber for rapid inflation; It delivers a continuous stream of air on both the up and down strokes, meaning you're able to fill your items faster than one-way pump PORTABLE: Bestway air pumps can be used on the go as they don’t require power source; Simply use an up and down motion to inflate your item quickly and efficiently! FEATURES: 3 valve adaptors to fit nearly every inflation valve, therefore you can use one air pump to pump up your SUP, kayak and airbed!