The user is fully protected from the voltage because the UT12D Voltage Detector doesn't need direct contact with the electricity conductor - it detects the voltage through the wire's insulator.
Specifications:
- Voltage Sensitivity: 90 ~ 1000VAC
- Bandwidth: 50 - 60Hz
- Voltage Indicators: Audio beep and flashing light
- Battery Indication: LED will not flash if the battery is less than 2V. Beep sounds may be weaker
- Silent Indicators: LED flashing only, saving battery
- Auto Power Off: (3 minutes)
- Power source: 2 x AAA batteries (not included)
What's in the box
UT12D Voltage Detector, Printed User Manual