Fangrui Product Details Use Lcd To Display All Parameters, Rich Content, Intuitive Understanding Of System Operation; Built-in Energy-saving Backlight, Better Display Effect, More Power Saving, With Switching Power Supply Regulated Output Dc12v And Usb5v Output, Can Be Used For Dc Lighting And Mobile Phone Charging; With Output Switch, Intelligent Control, Easy Operation; The System Power Supply Uses Switching Power Supply, Which Reduces The Static Working Current; Temperature Detection Circuit, With High-precision Temperature Compensation; Exposed Terminal, Wiring Is More Convenient, And Series Has A Large Metal Shell; Use Single-chip Control To Make The Controller Intelligent, Adaptable, And Reliable; Use Wpc Control Based On Pwm Upgrade To Greatly Improve System Efficiency And Extend Battery Life; Protection Function 1. Overload Protection 2. Short Circuit Protection 3. Rupture Protection 4. Undervoltage Protection 5. Overcharge Protection 6. Reverse Connection Protection Due To Different For Batches, There May Be Differenc