Color: dark grey material: abs plastic alarm indication: yellow led light: metal target has been detected flashing green led light: power on flashing red led light: low voltage indicator alarm signal: sound mode: buzzer and red led vibration mode: vibration and red led detect objects: metal(handgun, dagger, steel ball, coins) frequency: 22khz power consumption: 270mw max. Standby current: ï¼8mA reset time: 0.5 seconds, automatically detecting distance: pin, iron nail: 30-60mm / 1.18-2.36inch coins: 75-100mm / 2.95-3.94inch handgun: 160-180mm / 6.30-7.09inch six inch dagger: 160-170mm / 6.30-6.69inch 20mm steel ball: 20-30mm / 0.79-1.18inch operating voltage: 9v battery: 1 * 6f22 9v battery (Not Included) application: testing metal foreign body of raw materials, fuel and food, detection of underground pipeline and ; line, archaeology, exploration, found buried treasures of gold, silver and metal artifacts, the acquisition of scrap metal industry, customs and safety inspection, police department detective search, detection of interpol search, checking metal foreign bodies in express luggage. Operating temperature: -10to +65
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