The detector's sensitivity is adjustable to suit your needs. When set to a lower sensitivity, it can more accurately distinguish specific situations in complex wiring. The detector features 8 LED indicators in 3 colors (2 green, 3 yellow, and 3 red). It's easy and intuitive to judge voltage strength by automatically illuminating different colors and numbers of LED indicators, as well as the frequency of alarm sounds. Find the breaking point of a live wire by measuring the voltage change in the live wire. Safe and easy to identify a live wire by judging the detected voltage strength; the wire that detects the strongest voltage signal is live.