Features: SENSING MODE MEASUREMENT(NCV): The built-in sensor, when detecting nearby AC voltage, will cause the red light to flash and emit an audible alarm that increases with the signal strength. Additionally, when the signal is strong, the display screen will show "---U" and"---HI". Using this function, you can locate breakpoints in electrical wires. AC VOLTAGE AND LIVE/NEUTRAL WIRE DETECTION: Press the VOLTAGE button and insert the screw driver bit into the AC electrical socket to obtain the voltage value, and it will differentiate between the live wire and neutral wire based on the voltage level. BATTERY POSITIVE POLE DETECTION: With the right hand, press and hold the CONNECT button on the tester pen, then with the left hand, make contact with one end of the battery, and finally, use the tester pen probe to touch the other end of the battery. DUAL SOUND AND LIGHT ALARM: During voltage measurement, the dual indication on the display screen and the buzzer serves as a double reminder. When the backlight turns red, it indicates that the object being tested may be dangerous, and caution should be exercised. AUTO POWER OFF: In the absence of any operation and signal detection, the voltage detector will automatically shut down after approximately 5 minutes to prolong battery life. Specifications: Model: HT92 Material: ABS Display: LCD display Range of Voltage Detection: AC/DC 12~300V Measurement Error: (5%+3) Operating Temperature: 0~40 Storage Temperature: -10~50 Humidity: 95% Altitude: 2000m Alarm Mode: Sound and light alarm Probe Shape: Prolate shape Backlight: Red and green double color backlight Live and Neutral: According to LCD's display Signal Intensity Display: LCD display Signal Intensity Indication Method: Sound from slow to fast; Backlight from green to red; LCD data from small to big Flashlight: Yes Auto Power Off: No operation, no sensing signal will shut down automatically in about 5 minutes NCV: Yes Data Hold: Yes Low-battery Indication: Yes Power Supply: 2 * 1.5V AAA batteries (Not included) Safety Rating: EN61010-1, -2-030; EN61326-1, CAT II 300V Item Size: 185 * 27.5 * 27.5mm / 7.28 * 1.08 * 1.08in Item Weight: 47g / 1.65oz Package Weight: 93g / 3.28oz Package Size: 22 * 5.5 * 4.2cm / 8.66 * 2.16 * 1.65in Package List: 1 * Voltage Tester 1 * User Manual (English)