The digital battery over-discharge protection switch is specially designed for 12-36V lithium and lead-acid battery. This is a low voltage protection module, not included any battery. When the battery voltage reaches the setting values, the module will disconnect load automatically to prevent the battery from over-discharging so as to prolong the battery lifetime. Main functions: over charge protection, over discharge protection function, short circuit protection function, over current protection function. Supply Voltage: DC 12-36V ,Output Voltage: Equal to supply voltage ,Control Precision: 0.1V Power: Less than 1.5W Only suitable for a single battery, not for battery pack Compatible with 12-36V lithium and lead acid battery color:As shown Material:PC+Metal Package Contents: 3 x DC 12V-36V Voltage Protection Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.