Feature:1. Ultra high stability and high sensitivity, 360side-scan and Pinpoint tip detection. it can work indoors, outdoors, on sand, lawn or in soil, locate coin, silver, jewelry and gold with speed and accuracy.2. Built-in Speaker for Audible Sound Alerts, when move to research target, it will make sounds to inform you.3. Portable and convenient, it is mini and it comes with a string rope, so it is easy to hold and hang on the belt.4. Simple operation and lightweight, one-hand hold and you do not need to adjust, just press the button after putting the 9V battery in.( not battery included)5. Low power alert,three sensitivity levels with different LED indicators light, audio and vibrate alert.The Middle Yellow LED lantern will light up and then you need to change a new battery. Specification:Alarm mode: sound / vibration alarmMeasuring range: thumbtackScope: airports, railway stations, customs, port, stadium (museum), border defense department security checks, precious metals testing (such as gold and silver jewelry factory, electronic components factory) and the need to detect security sitesDetection distance:This detector sensor sensitivity due to the detection of metal objects in volume, size, density, surrounding environment, etc.Different factors change.Total Length: 230mmPowered by: 9V Battery (Not Included)includes:1 x Metal Detector