100w fast charging technology: Built in monocrystalline silicon battery, effective conversion can intelligently identify the intelligent IC chip of your device, and the conversion rate is as high as 25%, which is far higher than the ordinary solar panel charger Complete configuration: Easy to carry design comes complete with a compass and usb port. Foldable and portable: Easy to carry. Different from other multi panel solar energy on the market, the 4 panel design saves space and reduces weight to the greatest extent, making it easy to carry out. Waterproof and durable: solar panels are fully laminated, made of advanced laminating technology and high-quality materials, and can be used for more than 15 years. The solar panels are waterproof, can withstand all weather conditions, and can be directly washed with water Emergency charging: when you are traveling, camping, mountaineering, walking, cycling, hiking, picnics, road travel and other outdoor activities, this solar folding charging board can avoid the worry of power failure, and can be used for mobile phones, computers, mobile power, GPS, boats, etc.