... sound alarm 3. LCD screen 4. networking: optionalDoor metal detectorModel No.: AT-300BPerfect weather-proofing design for outdoor ... gun, and copper, aluminums, zinc (more than 150g), ignoring metal in belt button, shoes. Shock proof to avoid false alarmSound ... 1CE Certificate; ISO 9001:2000 Certificate, National standardFunction: Walkthrough Metal Detector can easily detect weapons, such as knife and ...