Small and simple, the ring detection head can accurately detect the position of metal, suitable for wood, school or factory where high sensitivity security inspection is not required.
1. Use the cycle switch to switch between the sound alarm and the concealed vibration alarm.
2. High sensitivity, can detect ferrous metals and non-ferrous metals, easy to use, convenient and easy to adjust.
3. When metal is detected, it has sound (or vibration) and photoelectric alarm function at the same time.
4. Alkaline batteries can work continuously for more than 40 hours with an alarm ratio of 10%-15%.
5. The detection range is the same when the 9V battery is released to about 7V. When the battery voltage is low, it will automatically and continuously alarm.