Non-Contact AC Voltage Detecto UT12A

Functions / Features UT12B
Voltage Sensitivity 90 ~ 1000VAC
Bandwidth 50/60Hz
Normal Indicators Beep and flashing LED indicate the presence of voltage
Battery Indication The LED will not flash if the battery is less than 2V.The beep
sounds will still have but may be weaker.
Silent Indicators LED flashing only, it could save battery
Auto Power Off Around 30 minutes