Hydration Backpack With 2L Bladder Bag And 6.5 Watts Solar Powered Panel Charging for iPhone, iPad, SAMSUNG, Mobile Phones, Tablets, And Other 5V Device Take Your Power with Smart phones, Tablets, MP3 Players, GPS Units and more while Camping, Hiking and more Outdoor Activities! SOLAR CHARGER BACKPACK (6.5W) - Enjoy free limitless power on the go with our solar charger equipped backpack. HIGH EFFICIENCY SOLAR CELLS - 22% Transfer in a protective anti scratch hardened coating sewn into high-wear PVC fabric for weather-resistant outdoor durability. DIRECT DEVICE CHARGING WITH VOLTAGE STABILITY CONTROLLER - Charge your device directly through a 5V USB port and the protection of our Voltage Stability Controller. Sunlight power can be very unstable which leads to unstable current and can shorten your device's life or even damage it. Built-in 2L water bag with long drinking straw is convenient to drink water anytime.