information: the supply voltage is DC 12V-36V, the output voltage is to the supply voltage, this voltage protection module could control the voltage within 0.1V Main functions: this digital low voltage protector is functional and practical, contains various functions, over charge protection, over discharge protection function, short circuit protection function, over current protection function Diverse usages: these disconnect over discharge protection modules are suitable for a of batteries and lithium batteries, a wide range of applications, when the battery is under voltage loss or low battery, it will be automatically disconnected LED screen display: designed with led screen display in digital way, which can allow you easily read the output voltage and stetting parameters, the voltage can be set within 12-36V as you like Discharge protection for batteries: when the voltage of battery has reached the setting voltages, this over discharge protection module will disconnect the load automatically to avoid the battery from over discharging to prolong the service life Some accessories are slightly different from the colour: blue Material: plastic Package Contents: 2 x Voltage Protection Module Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.