Dual Sensitivity and Range: Voltage tester can detect voltages in two voltage ranges: 12V-1000V / 48V-1000V (adjusted by "S" 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 marking: 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 neutral is detected. Non-contact voltage tester: The insulated housing of the voltage detector ensures safety. As the voltage signal intensity changes, the indicator increases or decreases and the frequency of flashes and beeps becomes faster or slower with the signal intensity. Auto power off and function of the flashlight: Automatic shutdown allow you to 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 fix. Our services: 1 x KAIWEETS Voltage Detector; 2 x 1.5V AAA Battery;