Voltage Tolerance: +/-0.1V Application Fields: 6-60V storage battery Size: 81 x 54 x 18mm Using Method: 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: blue Material: PC+metal Package Contents: 1 x Battery Charger Control 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.