1、Double Indication: When the voltage tester detects along the line, the indicator light does not light up and the beeping stops or slows down is the location of the breakpoint. 2、Adjustable Sensitivity: Voltage tester supports sensitivity adjustment, AC voltage detection range, can be switched between high sensitivity and low sensitivity. 3、IP67 Waterproof: Voltage detector is IP67 waterproof, fully airtight and waterproof, and can be used in wet locations for live breakpoint detection, line detection, etc. 4、Non Contact: When the voltage detector probe is placed close to the AC voltage, the signal indicator will light up and the beep will vary with the signal strength. 5、Compact And Portable: Compact voltage test pen is easy to carry and the pocket sized hook allows you to slip it into your clothing pocket for easy access at all times.