【ADJUSTABLE SENSITIVITY】 Adjustable sensitivity for more sensitive and flexible measurements; Dual test range for adjustable sensitivity (12-1000 V AC or 48-1000 V AC); During use, the NVC sensor of the probe automatically detects voltage intensity and displays it on the LCD screen. 【NON-CONTACT SAFETY VOLTAGE TESTER】 Safety compliance. The voltage tester can test the voltage without touching it. No risk of electrocution. During AC voltage test, it can automatically detect live wire / neutral wire; which has been specially developed for testing voltage for home security. The voltage tester can test the voltage without touching it. 【ACOUSTIC SIGNAL AND LOW VOLTAGE INDICATOR】 When the battery voltage drops below 2.4V, the LED display will change from green to red, to remind you to replace the battery. Lighting and probe for easy measurement, loud alarm sound, sound, light and triple alarms on screen for testing. If there is an alternating voltage at the measuring point, the integrated LED flashes red and a buzzer sounds. 【LCD SCREEN AND LED FLASHLIGHT】 White LED flashlight has high brightness and low power consumption, which illuminates the working area in the dark. Illumination and probe are combined for easy measurement. 【AUTOMATIC STOP AND PORTABLE PEN HOOK】 After approx. 3 minutes without operation and signal detection, the voltage detector will automatically turn off to extend battery life and save power. Small, thanks to its practical size and pocket clip, it also fits perfectly in your pocket. Features -Sensitivity adjustable -Identification of the live / null thread -Low battery warning -Portable pencil hook -High brightness LED flashlight -Energy saving, practical -High and low voltage signal indicator -Sensitivity indicator - Audible warning alarm - Loud and sensitive -Automatic shutdown -Good sensitivity of the NCV sensor