Portable Underground Metal Detector High Sensitivity Hand

This metal detector is portable and can be used for science education. It is also a plaything that children can use to stimulate and exercise intelligence.Features:High sensitivity can be used for science education.Easy and simple to operate lightweight and portable.Detection distance keeps steady when 9V battery is used up to 7V.Save power. Alkaline battery can work over 45 hours.Sound alarms when turn on or turn off device.LCD information screen gives you an easy to see and easy to understand information center that shows you what the metal detector is doing.Specification:Material: plastic+metalColor: blue+blackPower supply: 1 * 9V 6F22 battery (not included)Frequency: 30KHzStandby current: 30mAMaximum current: 70mAVoltage: 9VDetection distance:Iron nail: 30-60mm / 1.2-2.4inSensitivity: One coin: 70mm / 2.8inIndication mode: sound mode LCD modeStretch length: 840mm / 33.1inContraction length: 670mm / 26.4inDetector diameter: 165mm / 6.5inItem weight: 435g / 1.0lbPackage size: 650 * 170 * 70mm / 25.6 * 6.7 * 2.8inPackage weight: 705g / 1.6lbNote:Do turn off switch when not in use.Take out batteries if not in use for long period.Device sounds only when move above a metal it does not sound when point to metal immovably.Package List:1 * Metal Detector1 * English User Manual