allimity 21W Tri-Fold Folding Solar Charging Power Bank External Battery Charger Pack with 2 USB for iPhones, iPads, Samsung, Sony, HTC, Blackberry, Backpacking, Camping, Hiking and Outdoor Activities 1. Portable Outdoor Solar Power Bank: Solar conversion efficiency can be up to 22% 2. Dual USB Charging Port: 2 USB charging port, up to 2.4A output each under direct sunlight. compatible with iPhone6,iPhone 6 plus, iPhpne 5s iPad mini, iPad air 2, Samsung Galaxy S6/S6 edge/S5/S4/Note4/Note3, LG G3, HTC one M9/M8/M7, all the USB enable devices. 3. Folding Solar Power Panel: This solar charger is designed foldable. And it also has four durable lanyards in four corners which allows easy attachment to backpacks, trees, or tents; Easy and convenient for use in outdoor activities, camping, hiking and travelling. 4. Stand Up Design to Increase Charging Efficiency: This solar charger has two stands at the back to help the solar panel stays perpendicular to the sunlight. Highly increasing the charging efficiency.