The Water Tech Pool Blaster Aqua Broom is the world's first battery-powered pool and spa cleaner. This fully independent and completely self-contained unit removes all debris without any hoses, cords, or external pumps. You can use it on any shape or size above ground or in-ground swimming pool. It can be also used on any surface of swimming pool you have and they will not rip your pool liner. It can even be used in hot tubs, spas, kiddy pools, and even water fountains. The Aqua Broom uses 5 D batteries (not included) to provide up to 3 hours of use. On average, a set of batteries will last almost an entire season. No charging is required for quick cleanups, giving you the ultimate convenience of use.