Dual port Two devices can be charged at the same time during the journey, which can provide you with the fastest charging speed. best quality The best environmentally friendly silicone can protect it from rain, dust and impact/drops. Equipped with overcharge protection system. More than 1,000 charging life cycles. Broad compatibility Compatible with most USB charging devices, such as iPhone, iPad, iPod, Samsung phones, other Android phones, Kindle, Gopro cameras, GPS, etc. specification: Solar energy Battery type: polymer lithium ion battery Shell material: plastic Note: 1. In order to fully activate the solar panel, please charge it through the socket or computer for at least 10 hours when using it for the first time. 2. Please do not use solar energy as the main source of electric charge. Solar energy is mainly used to supplement the power of the device, and the charging speed depends on the intensity of sunlight and the conversion rate of the panel, which may take a long time. In daily life, we strongly recommend that you use the power supply to charge it. 3. It only takes about 10 hours to charge through the socket. Don't charge overnight or overvoltage 4. For safety reasons, please do not charge the mobile power in the car or put it on the dash due to the high temperature in the car. Do not charge while charging by yourself.