Under-voltage switch controller used to turn off the power of load in the event of the voltage dropping below a set value.When the battery voltage increases to a set value, the module will automatically turn on load again.With a LED indicator to show if battery is under-voltage.Turn-off and turn-on voltage value can be adjusted.At normal state, press and hold S1 and S2 buttons together, till display shows 888, to restore to factory setting.Fine workmanship and good performance.Easy to use.Long service life.Colour: picture colorMaterial: PlasticSize: 79x43x27mmPackage Contents:2 * Under-voltage ModuleOnly 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.