Ocean Reef Alpha Pro X-Divers, Руководство пользователя

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Alpha-Pro X-Divers manual rel.1.0
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INTRODUCTION
The ALPHA-PRO X-DIVERS is an hardwired, full-duplex
underwater communication system for conversations between
the surface and one or two divers.
It is an upgraded version of the ALPHA-PRO standard with
powered volume for both diver and surface. Moreover the volume of
the underwater unit can be adjusted from the surface unit to allow
the divers to have the best comfort during the dive.