Well made and Ultra Portable: Essential item for powering all your gadgets and also storing power in your batteries for those unexpected outages, fits in the glove box or under the seat of your car 2 USB Output and 5V 2.4A max per Port (under optimal lighting conditions): You could use these 2 ports to charge any 5V input electronic devices as fast as on the mains Water resistant to endure all weather conditions, great for nature trips, hiking, picnic, sailing or other outdoor activities, NOT for the USB Outputs High Efficiency Version: Built with SUNPOWER solar panels and its efficiency conversion will reach up to 21.5% -23.5%, while the conversion of most of the panels on the market is only 15% Package Contents: AUKEY 28W Solar Charger, Instruction Manual, Product Description This is absolutely a clean energy charger and a versatile tool to have when you are either camping or just out for a day out hike, just open the panels and connect the USB ports with your devices, getting power from the sun. 4 Aluminium Carabiner You could attach it to yourself/a backpack/the back of the wheelchair using the four metal flip clips that come with it, charging your devices with the solar energy on your move. Charging from Clean Energy Larger high efficiency solar panels convert up to 23% solar energy into enough power to charge two devices with the 2 USB Output up to 4.8A in total, do charge your devices rapidly as the mains and would not do harm to the environment. Excellent Workmanship With a matt finish on the panels making the solar panels less prone to marking and scratching. A small back pack on the solar charger let the storage of you cables of any other small accessories more convenient. Specifications Model: PB-P7 Transition Efficiency: 23.5% Output: Up to 2.4A per port Dimensions: 33.9" x 11.4" x 0.6" (86 x 29 x 1.5cm) Weight: 48oz/1360g