No pollution. No radiation. Protect the environment and save energy. WBM outdoor solar lights collect solar energy all day, then turn on automatically at dusk, no need to operate the ON/OFF switch again and again once put it into use, bringing you great convenience, so you can place it anywhere! With 2200mAh built-in rechargeable battery, it lights up to 12 hours in summer and 8 hours in winter after being fully charged. Charging time: 6-8 hours.