PORTABLE TRANSCEIVERS, REPEATERS, TELEPHONIC PATCHING UNITS, RADIO TELEPHONES, WIRELESS DATA COMMUNICATION LINKING UNITS, AMPLIFIERS/CHARGERS, BATTERY CHARGERS, WIRELESS PHONE LINE EXTENDERS, WIRELESS CURRENT LOOP COMMUNICATIONS UNITS, WIRELESS REMOTE CONTROL SYSTEMS AND ACCESSORIES THEREFOR, NAMELY, HOLSTERS, HEADSETS, BATTERY PACKS, REMOTE SPEAKER MICROPHONES AND TONE BOARDS