Checkout this Door Frame Metal Detector which is widely used in public places such as residential flats, shopping malls, airports, complexes and many other for security purpose. It detects the body of the person who passes through the door or gate. In addition to this, the said device is featured with DSP technology and provides automatic calibration. Door Frame Metal Detector is connected to LCD display as well as two lights mounted on front and back of it. This device provides stable performance, easy utilization and good battery backup. It also has alarm system which beeps when something is detected.