Product Dimensions:10 x 5 x 3 cm; 40 Grams Lift type:ON-OFF Item Weight:40 g Features:- This is a 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.- Designed with a LED indicator to show if battery is under-voltage.- Both turn-off and turn-on voltage value can be adjusted by simply pressing buttons.- This controller will help you to protect battery from over-discharging and prolong battery life.Specifications:Suitable Battery: 12V storage/lithium batteryControl Current: 20AControl Precision: 0.1VVoltage Error:0.1VSize: 8*4.3*2.8cm/3.1*1.7*1.1inWeight: 41g(approx.)Restore to Factory Setting:At normal state, press and hold S1 and S2 buttons together, till display shows 888, to restore to factory setting.Package Includes:1 x Battery Under-voltage Controller About this item [Application]: This is a under-voltage switch controller used to turn off the power of load in the event of the voltage dropping below a set value [Low Voltage Cut Off Automatic Switch]: When the battery voltage increases to a set value, the module will automatically turn on load again [LED Display]: The under voltage controller is designed with a LED indicator to show if battery is under-voltage [Manual Control]: Both turn-off and turn-on voltage value can be adjusted by simply pressing buttons [Battery Protection]: This charging controller protects battery undervoltage, protects battery overcharge, protects load control; This controller helps protect the battery from overcharging and extends battery life See more product details [Application]: This is a under-voltage switch controller used to turn off the power of load in the event of the voltage dropping below a set value [Low Voltage Cut Off Automatic Switch]: When the battery voltage increases to a set value, the module will automatically turn on load again [LED Display]: The under voltage controller is designed with a LED indicator to show if battery is under-voltage [Manual Control]: Both turn-off and turn-on voltage value can be adjusted by simply pressing buttons [Battery Protection]: This charging controller protects battery undervoltage, protects battery overcharge, protects load control; This controller helps protect the battery from overcharging and extends battery life