Automatically manage the working of solar panel and battery in solar system.Overloading & short-circuit protection.Easy to set up and operate.Reverse diacharging & reverse-polarity protection.Under-voltage and over-charging protection.Suitable for small solar energy system.Protection from lightning strike.Prolong the battery life cycle and keep the load work well.Specification:Color: BlackRated voltage: 12VRated charging current: 10ARated load current: 10AVoltage of stop power supply: *10.8V or 21.6VVoltage of resume power supply: *11.8V or 23.6VVoltage of stop charging: *14V or 28VWorking temperature: -20 ~ +60temperature coefficient of voltage stop charge: -3mV / / cellItem size: 10.2 * 9.5 * 3.8cm / 4 * 3.7 * 1.5inItem weight: 132g / 4.7ozPackage size: 11.5 * 10 * 4cm / 4.5 * 3.9 * 1.6inPackage weight: 136g / 4.8ozMaterial: plasticPackage included:1 x Solar charge controller1 x User's manualNote:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.