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. Fully automatic operation. Microcontroller digital accuracy. 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. Specifications: Color: Black Material: Plastic Voltage of Battery: 12V / 24V Automatic Rated Charge/Discharge Current: 20A USB Output Voltage: 5V Total USB Output Current: 3A DC Output Voltage: 12V Total DC Output Current: 2A Overload/Short Circuit Protection: 1.5 Times by Rated Current Short Circuit Recovery Time: 10s Open Circuit Voltage of Solar Panel: 40V No Load Loss: 0.05W Over Voltage Protection: 15V; x2/24V Float Charge Voltage: 14V; x2/24V Discharge Recovery Voltage: 12V; x2/24V Over Discharge Voltage: 10.5V; x2/24V Control Mode: Software Intelligent Control Working Temperature: -35~55C Item Size: 135 * 100 * 25mm / 5.31 * 3.94 * 0.98in (L * W * H) Item Weight: 222g / 7.83oz Package Size: 14.5 * 12 * 3.8cm / 5.7 * 4.72 * 1.5in (L * W * H) Package Weight: 270g / 9.54oz Package List: 1 * Solar Charge Controller 2 * DC Cable 1 * User Manual(English)