This Maplin Portable Hand Held Metal Detector Wand with High Accuracy Coil is primarily designed as a portable body security scanner for use in areas like airports, education, night clubs, courtrooms or any area's where metal objects need to be evaluated before entry. It can also be useful for finding lost metal objects in the home or outdoors or the presence of metal in wood or plaster. The scanner can be set to indicate the presence of metal by an audible buzzer or vibration and has a sensitivity adjustment for better control.The unit ships with a belt holder and wrist strap. A 9V battery is required to power the unit which can be non rechargable or rechargeable having a built in charger port. Specifications Power: 9V (6F22) standard or rechargeable battery (*Optional) Frequency: 25KHz Voltage: 9V (6F22) Weight: 400G (without battery) Size: 41 (L) 8 (W) 4.2 (H) cm Operating Temperature: -15 to +55