TecBillion 15W Portable and Foldable 2-Port USB Solar Charger PowerPort Solar for cellphone, iPad, buletooth speaker and More, with 4 Suction Cup, Camouflage Incredibly Durable and Water-Resistant: Make of 600D industrial-strength waterproof fabric. Fast Charging Technology: 15 watt SunPower solar array is 21.5-23.5% efficient, providing enough power to charge two devices simultaneously. (* suggest place smartphone in a cool place WITHOUT sunshine when charging) Highly Portable and Foldable: 11*5.9*2 inches. Eye-holes on each corner allow easy attachment to backpacks, trees, or tents. Lightweight (26oz) make it ideal for long treks, great for camping, hiking, picnics, and other outdoor activities. (4 Suction Cups included) Charging two devices simultaneously with dual USB port. Output current of 2 ports: 1A, 2A (5 volt). Tap into the sun's radiance and power up your gadgets with freedom. Make full use of natural energy, which is rather environmentally friendly.