With CE, RoHS certificate. Configuration 22Wp - Mono crystal silicon solar cell. 7W Super High Brightness Light source DC12V/33AH, Deep cycle Lead-acid battery, maintenance-free. The battery installed on the ground level, inside the square battery box, which is easy to replace the battery for user. Automatically light and time control, over-charge and over-discharge protection. 3M Galvanized cast-iron frame with powder coated. Feature 1. It has designed intelligent low control of circuit with over-charge/discharge protection and automatic light control program. 2. Solar panel with working life of 25years, batteries can work for 3 5years. 3. With high capacity battery under sunshine in one day, the lamp can work through whole night even if there are 3 5consecutive raining days. The light will work well continuously high-intensity/corrosion/heat-resistant engineering plastics shade with perfect transmittance and graceful appearance. 4. It's very convenient for installation and maintaince.