The Aiphone KB-3MRD audio/video master station works with the KB Series of door stations and sub-master stations (sold separately) to enable audio communication with visitors prior to authorizing access. The station connects to up to three door stations to monitor multiple entrances, and works with up to four sub-master stations to extend coverage to multiple rooms or large areas. The handset provides privacy when communicating with a visitor or between rooms.
This is a 16 beam infrared intruder detection system consisting of four transmitters, four receivers, and the associated electronics, alignment aids, instructions Etc. It has a range of 10-25 meters (about 33-82 feet). It does not include the required mounting towers, which are readily available online, or could easily be fabricated.
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