The Vie Air 10"" Rechargeable Drum Fan comes with built-in Lithium Batteries with 4 hours of cordless run time at High speed and 30 hours of cordless runtime at low speed in a single charge. Comes with a 12V adapter and can also be used while charging. Enjoy it anywhere around the house or take it with you on your next outing. Carry handle makes it easy to travel with. Perfect for all your indoor/outdoor use to stay cool during the summer heat.