Features: Used to c-harge mobilephones, MP3s, pads or other USB charging devices. Dual USB female interface, easy to c-harge the device through USB charging cable. You can put the panel in the sunlight and use it to directly c-harge the device. Very suitable for outdoor biking, climbing, hiking, camping, traveling, etc. Environment-friendly and pollution-free, it realizes the energy conversion from solar power to electric power. High conversion rate, high efficiency output, perfect weak light effect, as long as there is sunshine, it can work all the time. Use solar panels to cut your carbon footprint, because it is green and renewable energy. Unlike conventional generators, solar power does not release any harmful carbon dioxide or other pollutants.