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.