This solar charge controller adopts the advanced digital techniques and operates fully automatically. The PWM battery charging mode can greatly increase the lifetime of your battery and has various unique functions and quite easy to use features.Features:LCD screen display all parameters.With output switch, intelligent control, easy to operate. A key to open and close the load.PWM charging mode(SOC).With separated temperature detected circuit, high precision temperature compensation function.DC 12V and USB 5V charging for DC lamp and phone. Protection:Overload protection;Short-circuit protection;Lighting protection;Under-voltage protection;Over-charging protection;Reverse polarity protection.Speicifications:Color: BlackMaterial: PlasticVoltage of Battery: 12V / 24V AutomaticRated Charge/Discharge Current: 20AUSB Output Voltage: 5VTotal USB Output Current: 3ADC Output Voltage: 12VTotal DC Output Current: 2AOverload/Short Circuit Protection: 1.5 Times by Rated CurrentShort Circuit Recovery Time: 10sOpen Circuit Voltage of Solar Panel: 40VNo Load Loss: 0.05WOver Voltage Protection: 15V; x2/24VFloat Charge Voltage: 14V; x2/24VDischarge Recovery Voltage: 12V; x2/24VOver Discharge Voltage: 10.5V; x2/24VControl Mode: Software Intelligent ControlWorking Temperature: -35~55°CItem Size: 135 * 100 * 25mm / 5.31 * 3.94 * 0.98in (L * W * H)Item Weight: 222g / 7.83ozPackage Size: 14.5 * 12 * 3.8cm / 5.7 * 4.72 * 1.5in (L * W * H)Package Weight: 270g / 9.54ozPackage List:1 * Solar Charge Controller2 * DC Cable1 * User Manual(English)