... . Door metal detector 1. water proof 2. LED light and sound alarm 3. LCD screen 4. networking: optionalDoor metal detectorModel No ... and copper, aluminums, zinc (more than 150g), ignoring metal in belt button, shoes. Shock proof to avoid false alarmSound ... Certificate; ISO 9001:2000 Certificate, National standardFunction: Walkthrough Metal Detector can easily detect weapons, such as knife and gun, ...