iSunshineTech 28W Foldable Solar Charger with Dual USB Port, SunPower Panels with Built-in Smart Chips, Auto-ID Tech HIGH EFFICIENCY: The selected SunPower high efficiency multi-layer panels combined with built-in smart IC chip has a superior 22.5-24.5% solar power conversion rate and can reach up to 2.4A per port output or 4A Max output under direct sunlight. SAFETY GUARANTEE: FCC, RoHS, CE certified, short circuit protection & IPX4 water resistance, 18 months worry-free warranty provides you with full protection. SMART ADAPTER: Accurate Auto-ID Tech enables wide range of compatibility by detects your devices automatically and provide its fastest possible charging speed by replicates your device's original charging protocol. UNIQUE DESIGN: Large capacity zipper bag, built-in magnet closure, Industrial-strength rugged polyester water resistant canvas and 6 hanging loops and 4 Stainless-steel eyelets. HIGHLY PORTABLE: Compact size(11.1 x 6.06in folded) and Ultra-thin feature with only 1.49lb weight, easy to carry around. The selected SunPower high efficiency monocrystalline multi-layer panels brings up to 2.4A per port output or 4A total output under direct sunlight. Combined with built-in smart ICchip,it has a superior 22.5%-24.5% percent solar power conversion rate, which enable two devices being charged simultaneously with ease. Accurate Auto-ID Technology enables wide range of compatibility by detects your devices automatically and provide its fastest possible charging speed by replicates your device&#039;s original charging protocol. The short circuit and surge protection, water resistance technology keep you and your devices safe. Industrial-strength PET polymer faced solar panels sewn into a rugged polyester canvas offersweather-resistant outdoor durability. Large capacity zipper bag can holds your phone, cable, carabiner and any other small accessories safely. The built-in magnet closurewhich has apractical and durable feature gives you a good opening and closing experience. 6 hanging loops and 4 Stainless-steel eyeletsequipped with 4 aluminium-alloy hooks allow easy attachment to backpacks, trees, or tents. Compact size(11.1 x 6.06in folded) and Ultra-thin feature with only 1.49lb weight, easy to carry around.