This series solar charge controller is a kind of intelligent、 multi-functional solar charge and discharge controller. All the controlling parameters can be reset flexibly to satisfy your different needs.Features:Visual LCD graphic symbol、 brief key operation.Automatic identification system voltage level、 intelligent PWM charge mode.Adjustable charge/discharge control parameters、 settable operating modes of loads.Multiple selection of battery.Battery over temperature protection、 low voltage/reverse polarity protection.Over-load and short-circuit protection.With dual USB 5V output.Specifications:Color: BlackMaterial: PlasticRated Voltage: 12V / 24V (Auto Switch)Max. Charge/Discharge Current: 10A / 20A (Optional)Max. Solar Panel Input Voltage: ¡Ü50VStop Charge Voltage: 14.7V/29.4VLow Voltage Recovery: 12.2V/24.4VLow Voltage Protection: 10.5V/21.0VUSB Output Voltage/Current: 5V 2ANo Load Loss: ¡Ü10mATemperature Compensation: -3mV/Cell/¡ãCOperation Temperature: -20¡ãC~60¡ãCItem Size: 13 * 6.8 * 2.5cm / 5.12 * 2.67 * 0.98in Item Weight: 120g~152g / 4.23oz~5.38ozPackage Size: 14 * 8 * 4cm / 5.51 * 3.15 * 1.57inPackage Weight: 154g~187g / 5.46oz~6.61ozPackage List:1 * Solar Charge Controller1 * User Manual (English)