Del Sol 20 Hydration Station Is 100% Solar Charged And Charges While Being Used! The Solar Panel Is Retractable For Protection While Traveling, Or From Flying Balls. Large Opening Allows For Easy Filling And Cleaning And The Gasketed Lid Stops Leaks While Traveling. The Aluminum Dolly Is Equipped With Flat-free, Soft Ride Tires. Our Larger Pump And Battery Assure That Athletes Can Use All 6 Hoses At The Same Time With A Comfortable Water Flow Through The Easy To Use Bend Water Valves. Features & Benefits: