Charging function for mobile phone, you can charge your mobile phone when your mobile phone is out of power outdoors. Has three light sources the lamp can switch between two colors 3000k/7500k (warm white/cool white), SOS red flashing alert. The lamp can display the power in 4 levels and display the power in real time, which is convenient for you to charge in time and prolong the service life of the lamp. Polycrystalline silicon solar panels provide you with high photochemical conversion rate, you can charge them through a charger or solar energy to ensure enough power, different types correspond to different charging types.