Double 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 LCD screen. It meets many needs in residential, commercial and industrial environments. LCD Display and High Voltage Alert: During the test, the voltage intensity is displayed on the screen. The screen will light up in red or green. If the red light is flashing, a fast timeout alarm indicates that the phase is detected. If the red light does not flash, it means that the neutral is detected. The screen will turn red and display a high voltage symbol when the voltage is over 90V. Non-Contact Voltage Tester: Insulated voltage detector housing ensures safety. As the voltage signal strength changes, the bar graph on the screen increases or decreases and the frequency of flashes and beeps becomes faster or slower with the signal strength. Automatic shutdown and LED function: 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 attach. Our Services: 1 x Voltage Detector; 2 x 1.5V AAA battery; 1 x Manual. Product Description Adjustable Sensitivity Short press the green S button, it enters high sensitivity mode, then press again to disable this mode. AC voltage range: 48V-1000V / 12V-1000V