The voltage detector can measure exactly voltage in Li-lon, Li-Po and Li-Fe battery pack. It is easy to operate with high precise and full function. Sell Point: 1. High Precision 2.LCD Indicator 3.Alarm for over/ lower voltage Product Feature: 1. Voltage display resolution: 0.001V 2. Voltage Detection precision: 0.005V 3. Battery range: 2S-6S 4. Battery type: Li-lon, Li-Po, Li-Fe 5. User can set the value of alarm voltage, The unit will give a warning buzzer when any cell voltage reaches any value you set. 6. Display the balance voltage . 7. Display mode: Automatic & Manual, User can change it by your favor. 8. Built out a BP, User can set the alarm to switch between on & off.