Features 1、This DC voltage protection module is suitable for 12-36V battery/lithium battery 2、The module controls the relay on and off to control the output, very practical 3、The working voltage of the main board cannot be less than 7V, so the battery voltage must be &gt;7V 4、When the battery supplies power to the module, the output voltage is always equal to the battery voltage when the relay is closed 5、Three-digit high-brightness digital tube, display battery voltage in normal state Specification Item Type: DC Voltage Protection Module Material: PCB Range of Use: 12-36V Battery/lithium battery Control Accuracy: 0.1V Power Consumption: <1.5W Size: Approx. 57 x 42 x 19mm / 2.2 x 1.7 x 0.7in How to Use: +Key: Press once to display the protection value, long press to set the protection value -Key: Press once to display the return difference, long press to set the return difference value Package List 1 x DC Voltage Protection Module