All parameters are displayed on the LCD screen. With output switch, intelligent control. Fully automatic operation. Digital accuracy of the microcontroller. A key to open and close the load. PWM charging mode (SOC). With separate temperature detection circuit, high-precision temperature compensation function. Charging from DC 12V and USB 5V for DC lamp and phone. Overvoltage protection; Short circuit protection; Light protection; Undervoltage protection; Overcharge protection; Reverse polarity protection. Good workmanship and good performance. Easy to use. Long . Battery voltage: 12V Nominal 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 the rated current Short circuit recovery time: 10s Open circuit voltage of the solar panel: 40V No load loss: 0.05 W. Control mode: Intelligent software control, Working temperature: -35 ~ 55 Colour: black Material: ABS Size: 135 x 100 x 30mm Package Contents: 1 x solar controller 2 x charging cables Only the above package content, other products are not included. Note: Light 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.