Inflates your inflatable with manual action similar to a bicycle pump. Inflates on both the down stroke and the up stroke for no wasted effort and faster inflation. Universal valve fittings allow this inflation pump to inflate air mattresses, pool rafts, beach balls, inflatable boats and more. Includes an accordion air hose with 3 interconnecting nozzles to fit small, medium and large diameter inflation valves. Durable, portable and easy to use.