ITEM NAME:2X(Vhm-003 Charging Control Module Digital Led Display Storage Lithium BattT7W2) 2X(Vhm-003 Charging Control Module Digital Led Display Storage Lithium BattT7W2) 2X(Set Starting Voltage:in normal display voltage state,press the button will display start charging voltage;long press for 3s the digital tube will flash;you can start or stop button to set starting up charge voltage value Set Stop Voltage:in normal display voltage state,press the button will display stoping charge voltage;long press the button for 3s the digital tube will flash;you can start or stop button to set stoping charge voltage value Factory Reset:in power on state press the start/stop button at the same time,digital tube will display 888;that represents factory reset settings Colour: Black Material: metal + plastic Model:VHM-003 Input Voltage:DC 10-30V Display Precision:0.1V Control Precision:0.1V Output Type:direct output Voltage Tolerance:+/-0.1V Application Fields:12-24V storage battery Size;82*58*18mm Package contents: 1* module)