Using the power of two rapid charging solar EcoPanels, the Opteka SP-11W is your new best friend when you"re far from home. Travel with ease using the charger"s loops which attach to your backpack or tent. Unfold the device and expose the 11 watt Eco-crystalline solar panel, each section putting out approximately 900mA under strong sunlight. Dual USB charging ports allow up to two devices to recharge at once at a maximum output current of 2 Amps. No matter where you go, the Opteka Dual EcoPanel Solar Charger will be ready for you. *Note: The SP-11W does not include any connecting cables. You will need to use the USB cable that came with your device Specifications Solar Panel Type: 2X Eco-crystalline, output of 900mA each Input: 11-Watts Output: Dual 5V standard USB ports Operating Temperature: 32-95DegF (0-35DegC) Folded Dimensions: 6.5" X 11" X 1" (16.5cm X 27.9cm X 2.5cm) Expanded Dimensions: 19.5" X 11" X .5" (49.5cm X 27.9cm X 1.3cm) Weight: 17.6oz (500g)