Access control and alarm monitoring systems; Alarm sensors; Baby monitors; Burglar alarms; Carrying cases, holders, protective cases and stands featuring power supply connectors, adaptors, speakers and battery charging devices, specially adapted for use with handheld digital electronic devices, namely, cell phones, MP3 players, personal digital assistants; Communications headsets for use with communication radios, intercom systems, or other communications network transceivers; Devices for wir...