Characteristic:
The cycle switch is used to switch the sound alarm and the covert vibration alarm functions respectively.
It has high sensitivity and can detect ferrous and non-ferrous metals. It is simple, convenient and easy to adjust.
When metal is detected, it can alarm both sound (or vibration) and light.
Alkaline batteries work at alarm rate of 10% - 15%, and can work continuously for more than 40 hours.
Battery 9V to 7V, detection distance unchanged. When the battery voltage is insufficient, it will automatically and continuously alarm.
