Specifications:The lightweight design and comfortable handle grip make it easy to use for long periods of time.With built-in induction coil, when metal is detected, it will quickly respond to alert.There are tow kinds of alerts, including sound alert and vibration alert.Using intelligent power saving technology, it can be used for 40 hours at a time when it is fully charged.It is widely used at schools, subway, airport, train station, etc.Item Name: Metal DetectorMaterial: ABSStyle 1 Model: MD-3003B1Style 2 Model: GP-3003B1Sensitivity: Standard SensitivityPower Supply: 1 x 9V Battery(Not Included)Working Hours: More Than 40hAlarm Mode: Vibration and Sound Double AlertsTransmission Frequency: 22KHZOperating Temperature: -10 Degree Celsius - +55 Degree CelsiusFeatures: Handheld, Double Alerts, High PrecisionSize: 41cm x 8cm x 4.2cm/16.14" x 3.15" x 1.65" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Metal Detector