"The AlphaCool 5V Cooling Fan Vest has 2 high-powered fans that circulate air directly around your body for cooling relief, instantly and constantly. This powerful cooling design helps you keep cool inside or outside. 2 powerful fans on either side, near the back built into the vest, create a breeze for a strong cooling sensation. It's the best cooling vest for long, hot summer days in the hunting fields, at the beach, gardening, at a ballpark, or working in hot conditions. Stay safe and avoid heat stress when you keep cool. Battery-powered cooling in this ""air-conditioned vest"" actively cools the wearer for up to 10+ hours. Manufacturer style #: AC-FV-5V-N. Dual high-power fans to circulate air around your body for instant cooling relief Ideal for everything from hunting to gardening, the beach, stadiums, site work, and more Helps you stay safer and avoid heat stress in hot conditions Runs up to 10+ hours"