The Nerf Super Soaker Thunderstorm is the first-ever battery-powered Super Soaker. There is no pumping required. All you do is pull the trigger to fire a continuous stream of water up to 25 feet away. For fast reloads, use the Nerf Super Soaker Clip System Refills, which are sold separately. http://www.timetoplaymag.com/toys/2509/hasbro/nerf-super-soaker-thunderstorm/