Features: 1Wire 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. 2Lighting 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. 3Automatic Shutdown: The voltage test pen will automatically shut down when there is no operation within 5 minutes and no voltage signal is detected. 4Ambient Temperature Display: The ambient temperature range of the voltage tester is 0 to 70C, which can display the current ambient temperature, and the voltage test pen can cope with complex environments. 5High 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. 6User Friendly Clip: This voltage tester is easy to carry and has a user friendly clip, so you can take it anytime and very practical. Item Type: Voltage Tester Material: PC AC 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 60HZ Alarm Mode: HD screen display, sound and light alarm Automatic Shutdown: About 5 minutes without any operation will automatically shut down Battery 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 on Ambient Temperature: 0 to 70 (32F to 158F), 2 or 4F NCV Sensitivity Adjustment: Press L or H to switch Live and Neutral Wire Judgment: According to the voltage signal weak judgment, strong voltage for the live line Breakpoint Judgment: Single stranded line charged judgment, according to the alarm signal to determine the location Power 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 1 x Voltage&nbspTester(Shipping Without&nbspBatteries) 1 x User Manual