Dual Detection ModesThe default automatic measurement range of AC voltage is 48-1000V, in addition, you can also press the MODE button to switch to manual mode (with wide measurement range between 12 and 1000 V) V. satisfying all your needs. Adjustable SensitivitySwitch to manual mode. You can adjust the sensitivity by turning the sensitivity adjustment knob. Low sensitivity mode allows more accurate determination of field conditions on complex lines. The high sensitivity mode detects the condition of the walls. and hidden lines. Sensor Chip IndicatorWhen detecting voltage, the LEDs produce three different colors: green - low, yellow - MED, red - high. < p >Live Wire TestThis non-contact voltage tester can easily distinguish line and zero line. Signal indicator according to different loud and insistent beeps in the light signal caused. ge is online. LED flashlight and visual sound indicatorThe indicators emit yellow and red lights, sound alarms at different frequencies (low, medium, high). Visual and audible alarm to ensure your safety. The LED flashlight design makes it easier to work in a dark environment.