HAND-HELD METAL DETECTOR ION FUME DETECTOR DOOR TYPE METAL DETECTOR PORTABLE METAL DETECTOR ALL-DIRECTION DETECTION CEILING TYPE DOUBLE-MONITOR DETECTOR CURTAIN DETECTION DIRECTION IDENTIFICATION INFRARED DETECTOR ALL-DIRECTION DETECTION CEILING TYPE INFRARED DETECTOR ALL-DIRECTION DETECTION CEILING TYPE WIRELESS DETECTOR DOUBLE SCREEN DETECTION MICROMINIATURE INFRARED DETECTOR WIDE-ANGLE DETECTION HANGING TYPE DOUBLE-MONITOR DETECTOR WIDE-ANGLE DETECTION HANGING TYPE INFRARED DETECTOR WIDE-ANGLE DETECTION HANGING TYPE WIRELESS INFRARED DETECTOR WIRELESS MAGNETIC DOOR DETECTOR WIRELESS INTELLIGENT BURGLARPROOF TELEPHONE ALERTOR HOUSEHOLD BURGLARPROOF TELEPHONE ALERTOR MICRO POWER CONSUMPTION SMART CARD ELECTRIC CONTROL LOCK