Feature:1. A variety of modes are available, which is more convenient to use and meet different needs.2. You can save the set parameters forever without having to change them every time for saving time.3. Use highquality electronic components to effectively prevent product damage.4. When the battery voltage reaches the setting values, the module will disconnect load automatically.5. Over charge protection, over discharge protection function, and over current protection function.Specification:Item Type: Voltage Detection ModuleMaterial: PCB.Package List:1 xVoltage Detection ModuleNote:Don't use it to detect AC voltage, it will be unstable or even burn out the board, pulsating DC is also easy to fluctuate (DC signal directly rectified without filtering), it is necessary to detect pure DC signal. (It is recommended to purchase with a certain amount of handson ability)