Listing ID #3939153
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Contact SupplierIt 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 With sound & light and vibration alarm. With shielded damp-proof sensitivity adjusting hole. *Working power supply: 6F22ND 9V battery (alkaline rechargeable battery), rechargeable battery *should be taken out and recharged (the price included the charger and battery) *Alarm mode: Simultaneous sound (vibration)and light alarm.