Popular And Energy-Saving,Environmental Protection and High Quality Body, Overall Use Of High Quality Materials, High Temperature Corrosion-resistant, Moisture-proof. No wires,sensitive to light, auto on at night and auto off at the sunrise; Convenient to use.An automatic sensor detects sunlight, turning on and off the light with the departure and arrival of the sun. This way, you can spend more time with your guests, and less time fussing with lights.High power single silicon solar cells, rechargeable conversion rate of up to 17%. No battery needed. A small built-in rechargeable battery stores the solar energy.