1、Wire Judgment: Live wire alarm is rapid, red lighting is displayed. Neutral wire alarm slow, green lighting shown. Safe and easy to judge, sound and light alarm and screen display is more clear. 2、Lighting Function: There is a high brightness flashlight embedded in the tail of the smart voltage test pen, so that you can continue to work in places with insufficient light. 3、Automatic Shutdown: The voltage test pen will automatically shut down when there is no operation within 5 minutes and no voltage signal is detected. 4、Ambient Temperature Display: The ambient temperature range of the voltage tester is 0 to 70°C, which can display the current ambient temperature, and the voltage test pen can cope with complex environments. 5、High Sensitivity: The voltage test pen can switch to high sensitivity, perform partition wall detection, security inspection of wires, and insulation operations, so that you can know the distribution of lines in your heart. 6、User Friendly Clip: This voltage tester is easy to carry and has a user friendly clip, so you can take it anytime and very practical. 1 x Voltage Tester(Shipping Without Batteries)1 x User Manual Item Type: Voltage TesterMaterial: PCAC Voltage Detection Range: 12 to 1000V (press L or H to switch), 48 to 1000V (press L or H to switch)Frequency Range: 50HZ or 60HZAlarm Mode: HD screen display, sound and light alarmAutomatic Shutdown: About 5 minutes without any operation will automatically shut downBattery Low Alert: Battery sign will appear on the screen when the battery power is lower than 2.6V, and will automatically shut down after power onAmbient Temperature: 0℃ to 70℃ (32°F to 158°F), ±2℃ or ±4°FNCV Sensitivity Adjustment: Press L or H to switchLive and Neutral Wire Judgment: According to the voltage signal weak judgment, strong voltage for the live lineBreakpoint Judgment: Single stranded line charged judgment, according to the alarm signal to determine the locationPower Supply: 1.5V AAA batteries x 2 (shipping without batteries)Size: Approx. 160 x 23 x 26mm / 6.3 x 0.91 x 1.02in Safety Grade: CE CAT.III 1000V or CAT.IV 600V