tSpecifications:tThe lightweight design and comfortable handle grip make it easy to use for long periods of time.tWith built-in induction coil, when metal is detected, it will quickly respond to alert.tThere are tow kinds of alerts, including sound alert and vibration alert.tUsing intelligent power saving technology, it can be used for 40 hours at a time when it is fully charged.tIt is widely used at schools, subway, airport, train station, etc.tu00A0tItem Name: Metal DetectortMaterial: ABStStyle 1 Model: MD-3003B1tStyle 2 Model: GP-3003B1tSensitivity: Standard SensitivitytPower Supply: 1 x 9V Battery(Not Included)tWorking Hours: More Than 40htAlarm Mode: Vibration and Sound Double AlertstTransmission Frequency: 22KHZtOperating Temperature: -10 Degree Celsius - and55 Degree CelsiustFeatures: Handheld, Double Alerts, High PrecisiontSize: 41cm x 8cm x 4.2cm or 16.14