Airport and border security, checking parcels and letters for metal objects and anywhere that hidden metal needs to be detected. Conveniently and simply to operate. Easily to adjust. Low Power Consumption and low battery indication Easy to detect a pins size metal objects. Easy to save, low failure rate. With LED indication. Rechargeable function, charge time 4-6 hours. When detecting metal, sound alarm and vibration alarm optional, vibration function can be used in noisy work situations or wishing audio tune not be heard. Automatically reset switch to the sensitivity function, so it is capable of detecting large, but also detecting small metal objects. Application: Widely used in, airports, railway station, metro station, industrial sites, schools, conferences, sport events. for checking the body, handheld baggage, mail and parcels are inpossession of weapons, cutters and hidden metal objects or prevent cheating. Lightweight and portable, exquisite design, easy operation. With leather hand strap, portable and to use.