-Off-the-grid power: When you're out enjoying the great outdoors, enjoy yet another perk: free limitless power. Simply spread out the solar panels or attach to your pack to start repowering your gadgets. -Fast charging technology: Exclusive to Anker, PowerIQ discovers and replicates your device's original charging protocol to provide its fastest possible charging speed up to 2.1 amps overall (with enough direct sunlight). -Superior portability: Compact dimensions (11 × 6.3in folded or 18.9 × 11.in opened) and rugged elastic loops on the top and four corners make attaching it to a backpack, tree branch, or tent a synch. Super lightweight (12.5oz) and slim foldable design ensure it easily fits in your daypack. Incredibly durable: Industrial-strength PET plastic faced solar panels sewn into high-wear polyester canvas ensure it's able to withstand the trials of your outdoor adventures. -Advanced safety: Short circuit and surge protection technology keep you and your devices safe. -For optimal use: Ability to charge your device dependent on sufficient sunlight. While the polyester canvas provides some water protection, we recommend minimizing moisture exposure to protect electrical components.