This is the only market umbrella that extends the battery life of mobile devices, so you can frolic longer outdoors without fretting over a drained battery. Four 10" x 4 1/4" solar panels woven into the umbrella's 9' diameter canopy convert sunlight into electricity which is accessed via two USB ports in its pole. A rechargeable 3.7-volt/1000mA backup battery provides power in overcast conditions, ensuring smartphones and tablets have an uninterrupted supply of power. The umbrella's canopy withstands wind gusts and blocks 98% of the sun's harmful UV rays for a UPF rating of 50+, the highest attainable. The lightweight yet sturdy 8' L aluminum pole and spreaders have a powder-coated finish for weather resistance. The umbrella opens and closes easily via a smooth-operating hand crank. Base sold separately. Green. (15 lbs.)