Item Type: Battery Charging Control Module_x000D_Material: PCB_x000D_Purpose: Automatic switch protection for battery charging_x000D_Input Voltage: DC 10-30V_x000D_Display Accuracy: 0.1V_x000D_Control Accuracy: 0.1V_x000D_Output Type: Direct output_x000D_Voltage Error: -0.1V_x000D_Range of Use: 12-24V various storage batteries_x000D_Product Size: Approx. 82 x 58 x 18mm / 3.2 x 2.3 x 0.7in 1Press once to display the starting voltage, long press the number to flash, and then set the starting voltage value through the start and stop buttons 2Press once to display the stop voltage, long press the number to flash, and then set the stop voltage value through the start and stop buttons 3When the start/stop button is pressed in the power?on state, the digital tube will display 888, which means the factory reset setting. 4When it is detected that the battery voltage exceeds 14.4V, the relay will cut off the charger to charge. 5Energy saving and can extend the life of the battery to prevent overcharging.1 x Battery Charging Control Module