Aeris A300 CS OLED Color Display Dive Computer Complete with Transmitter & US... Operating logic and features similar to Aeris A300 AI, with full dot matrix color OLED Wrist and potentially a retractor version, 3-Axis Digital compass Direct contact USB & Bluetooth, User replaceable battery Modes &gt;&gt; NORM, TECH, GAUG, FREE, COMPASS Dual Algorithm &gt;&gt; May be changed when Desat = 0.