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Function features: *It features simple operation, exquisite design, convenient conservation and low failure rate.*Highly sensitive, it can easily detect pin-sized metal articles (or even smaller metal articles).*Its sensitivity can be adjusted according to the on-site requirements.*Indication of low battery voltage (LED light is always on).*It is praise worthy that its price/performance ratio is higher than other products of the same category. *There are two kinds of alarms, including sound & light and vibration. Product parameters: External dimensions: Length 395 mm*140 mmProduct weight: 20/box, 7.4 kg/box, Packaging dimensions: 52.5 cmX31.6 cmX37.8 cmWorking power supply: 6F22ND? 9 V battery (alkaline battery, rechargeable battery)Alarm modes: sound & light, vibration (switch)
