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 lifetime.Battery voltage: 12VNominal charge / discharge current: 20AUSB output voltage: 5V USB output current: 3ADC output voltage: 12V DC output current: 2AOverload / short circuit protection: 1.5 times the rated currentShort circuit recovery time: 10sOpen circuit voltage of the solar panel: 40VNo load loss: 0.05 W.Control mode: Intelligent software control, Working temperature: -35 ~ 55Colour: blackMaterial: ABSSize: 135 x 100 x 30mmPackage Contents:2 x solar controller4 x charging cablesOnly the above package content, other products are not included.Note: Light reflection 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.