MDH-1002 Hand Held Metal Detector Hand-held Metal Detector MDH-1002 Technical Specifications: Power: 9V (6F22) alkaline batteryOperate Frequency: ... at 30mm; USD 25 Cent at 75mmLow Sensitivity: Detector only responds to bigger metal article such as a 64-gun (18cm), 6 ... Prevention, Schools, Corporate Security, Stadiums/ Concerts, Historical Landmarks MDH-1002 Hand Held Metal Detector