1. Using cycle switch to switch sound alarm and hidden vibration alarm functions.
2. High sensitivity, it can detect ferrous and nonferrous metals. Simple to use, convenience, adjust easily.
3. When detect metal has sound (or vibration) and light alarm function.
4. Alkaline battery works with 10%-15% alarm ratio, can work continuously for more than 40 hours.
5. The battery is placed at about 7V -9V with the same detection range. When the battery voltage is low, it will automatically and continuously alarm.
1. Test surface
2. Color-changing luminescent tube(green is the power indicator,red indicate alarm)
3. Sensitivity regulating hole
4. Buzzer sound hole
6. power off
9. Cell cover