The H2Odyssey Fathom 55 Dive Computer CFP Module, manufactured with Cochran technology, is ready for installation in your console, Hose, Retractor or wrist mount (does not fit some applications); Air (21%) Configuration (Nitrox upgrade available adjustable 21-50%); DAN approved & uploadable with OPTIONAL software kit; 4 second sampling for up to 20 Dive hours (additional recording hour upgrades available); Manual & water activation; Depth Rated to 180ft/60mtr (330ft/100mtr Depth upgrade available) Downloadable up to 256 dives; Imperial / Metric selectable; Automatically detects Salt / Fresh water for Depth Density adjustments; Depth and Bottom Time mode; User Changeable Batteries; 2 year warranty from “Date of manufacture”.