9 (Based on 44(e)) Photographic, optical, weighing, measuring, signaling, checking (supervision) apparatus and instruments, namely, cameras, videoscreens, battery chargers, remote display units, battery backup sets, scales and alarms for hand-held and walk-through metal detectors; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, breakers, switches, couplers, transformers, accumulators, adjusters, regulators and controllers for hand-held and walk-through metal detectors; apparatus for recording, transmission or reproduction of sound or images, namely, recorders, videos and video displays, and video screens; blank magnetic data carriers, blank recording discs, calculating machines, data processors, computers; radar detectors; metal detectors; metal detectors combined with or without various personal identification technologies or biometric technology; computers and peripherals thereto, operating software for metal detectors and personal identification readers; video monitors, projection screens, liquid crystal displays, traffic lights and alarm relay contacts to be used in the field of metal detection and personal identification