1. LCD Screen Display: This solar panel charger controller has an LCD to display all parameters. The LCD has rich contents, allowing users to intuitively know the working condition of the controller. The LCD display features a builtin energysaving backlight, providing a better, clearer, more beautiful, more modern, and more powerefficient display. (Please correctly connect the positive and negative terminals and ensure all terminals are tightly connected.) 2. Fully Automatic: This solar panel regulator has an output switch and intelligent control, making it easy to operate. Connect the controller and the battery with cables of the correct polarity. The battery indicator light on the controller will be on if the connection is successful; otherwise, check and reconnect. 3. Powerefficient: With microcontroller digital accuracy, when charging, the arrow between the panel icon and the battery icon will flash quickly. When the battery is fully charged, it will flash slowly and stop charging. The controller functions to protect against voltage overshoot and discharge. It is available for charging DC lamps and phones. There is a key to open and close the load. 4. Rated Discharge Current: 20A; USB Output Voltage: 5V; USB Output Current: 1.5A; DC Output Voltage: 12V 24V, DC Output Current: 20A. Connect your load and the cables with the correct polarity and then connect to the load output port of the controller. Pay special attention to the polarity to avoid reversed connection, otherwise, your load may be damaged.