StrongVolt Solar Chargers work with your phones, tablets, GPS or any USB chargeable devices wherever you go. Keep your phone or USB device fully charged anywhere there is sun.StrongVolt Solar Chargers are a must for emergencies,natural disasters, or on any outdoor adventure.Solar Power for your Devices Each solar panel has 1 USB output which can be connected to any USB powered devices. Some of these devices include Android & Apple Device, Smart Phones, Tablets, PS Vita, GoPro, and many more. If you"re uncertain if your device is compatible, please email us at Contact@StrongVolt.com Available in 5 Great Sizes and Power Outputs to Meet any Need 3W Panel - 7 oz. The smallest and lightest. Great for emergencies. Fully charge an iPhone in about 6 hours. Not the for iPads or tablets. 5W Panel- 9 oz. Very portable, great for everyday phone and eReader charging. Fully charge an iPhone in about 4 hours. Good for eReaders. Not for iPads or tablets. 6W Panel -12 oz. Great Middle ground; lightweight and thin, yet powerful for everyday charging. Fully charge an iPhone in about 4 hours. Good for eReaders. Not for iPads or tablets. 7W Panel - 11.5 oz. More Power- Best for everyday phone and eReader charging. Fully charge an iPhone in about 2.5 hours. Good for tablets and eReaders. Slow for iPads 10W Panel- 12 oz. Max Power- Fastest charger for phone, tablet, eReaders and other USB devices. Fully charge an iPhone in about 2 hours. Good for tablets and eReaders. Slow for iPads What"s in the Package? 1 StrongVolt Portable Solar Charger with 1 USB output port.Full 100% Satisfaction Guarantee If for any reason you are not satisfied, please email us- Contact@StrongVolt.com and we will make the situation right.