Dual Sensitivity and Range: Voltage tester can detect voltages in two voltage ranges: 12V-1000V / 48V-1000V (adjusted by inchSinch key). The probe's NVC sensor recognizes the voltage and displays it on the LED Indicator. It meets many needs in residential, commercial and industrial environments. LED indicator and phase identification: During the test, the voltage intensity is displayed on the indicator. The indicator will light up red or green. If the red indicator flashes, a fast timeout alarm indicates that the phase is detected. If the red indicator does not flash, it means the neutral is detected. Non-contact voltage tester: The voltage detector's insulated housing ensures safety. As the voltage signal strength changes, the indicator increases or decreases, and the frequency of flashes and beeps becomes faster or slower with the signal strength. Auto shut-off and flashlight function : Automatic shutdown let you save and control electricity; Equipped with a flashlight on the tip, allows it to be used in the event of a power outage or in dark environments; Pocket clip makes it easy to attach. Quantity delivered: 1 x Voltage Detector; 2 x 1.5V AAA Battery;