Solar power: Single crystal 1.5W Battery type: Li-polymer battery Capacity: 20000MAH Input: DC 5V/1.0A Output: DC 5V/1A DC 5V/2.1A Housing material: Plastic + Silicone Dual Ports Charge two devices at the same time while on the go, 2.1A charge provides the fastest charging speed to you. Highest Quality The best eco-friendly silicone protects it from rain, dirt, and shock/drops. It uses lithium polymer batteries with 15000mAh. Equipped with over-charge protection system. Over 1000+ recharge life cycle. Wide Compatibility Compatible with most USB-Charged devices such as for iPhone,for iPad, for iPod, for Samsung phones, other Android mobile phones, Gopro Camera, GPS and More Kindly Note Solar charger is mainly for emergency use, not a main charging resource. It takes about 40 Hours to be fully charged under direct sunlight, so it is highly recommended to charge by wall charger, which only takes about several hours.