Absorb direct sun light and convert up to 85% of power into free energy, no battery required. Built-in Micro USB cable and USB output port to supply power for your electronic products. Elastic straps help fix your electronic product in place. Attached compass helps guide direction in emergency. Roll up and fold into a compact size for easy storage and carrying. Perfect for camping, RV trips, home emergencies, hurricane preparedness, and other outdoor activities. Solar power: 50% off = 9W 60%=10.8W