1. Well designed, compact and lightweight, portable with string bracelet, ideal for important occasions: park, school, museum, airport, subway 2. High detection sensitivity, large metal detection area, temperature detection range is -15 to 45 3.Three battery power indicator: green for normal(high power), yellow for suggest(low power), and red for battery replacement or repair. charging(dead power) 4.Power powered by 9V battery (included), Two indication security mode: you can choose either alarm signal or vibration signal 5.It's very easy to use, the ability to fight, is great for checking rare illegal goods Product Description Handheld Metal Detector High sensitivity Product introduction: This is a handheld metal detector with large detection area, fast detection speed and high sensitivity. Perfect for security check and detection of prohibited goods, electronics, metal, etc. in stations, borders, school, courtyards, halls, factories and so on Product features: 1. Temperature detection range: -15~45. 2. Frequency: 25K 3. Power consumption: 270MW max 4. Working Voltage: DC 7~12V. 5.Standby Current: < 5 MA 6. Reset time: 0.5 seconds, automatic Sensing distance: Pin: 0 1.18. Iron nails: 0 6 .36 cm. Handgun: 0 9.94 cm. Dagger: 0 12.9 cm. Ball diameter in steel: 0 6 cm Power supply: Power source: 9 V battery (included). Open the battery cover and install the 9V battery