It can be charged by sunlight for outdoor work, which is convenient and eco-friendly. It can also be charged by USB cable,meet your diverse needs.Standby Charging Bank:You can charge mobile phones and other USB-powered devices when needed,compatible with multiple devices.Durable Material: The lamp is made of safe and high-quality material ABS with the characteristics of high strength, good toughness, and strong impact resistance. The waterproof design makes it can be normally used on cloudy and rainy days.