DOOR FRAME METAL DETECTOR SGS-C600 Six Zone Walk Through Metal Detector Features: 1. Six detection zones. 2. Manual and automatic by built-in key pad. 3. Detect multiple metal objects of various size in all the zones simultaneously. 4. Complex circuit design, extra infrared devices can reduce false alarm and omissions effectively. 5. Easy assembly. Self diagnosis during power on. 6. Calendar: Can be set up on (date) (month) (year). 7. Language: Chinese and English version. 8. Harmless to pregnant women, disks, video tapes etc.