* It can easily detect pin-size metal articles (away 3.5cm to the
probe)
* It has an independent battery low voltage system and
the
yellow light will be on
* sound & light and vibration alarm
* With shielded damp-proof sensitivity adjusting hole
* Working power supply: 6F*2ND 9 V battery (alkaline
battery,
rechargeable battery), rechargable battery should not
be taken out and rechared (the price not included the charger
and battery)
* Alarm modes:Simultaneous sound (vibration)and light
alarm
