With super high sensitivity, it can detect extremely tiny metal articles
The adjusting button can eliminate interference.
The auto-testing will begin when it is turned on. It needn't adjustment.
With a large scan area it can rapidly and accurately complete the detection.
Working frequency: 95 KHZ
Adjusting mode: Automatic
Indicator: The sound gradually rises.
Alarm modes: Simultaneous sound and light alarm
9V Rechargable Battery & Charger