AIRE B.U.G Nitrox compatible dive computer. - Power on, screen display, and button response are normal (simple operation confirmed). - Nitrox (oxygen concentration) compatible model. - Includes the main unit and protective case (everything in the photos). - There are scratches and minor imperfections from normal use, but no critical damage. *Professional diving tests have not been performed. *Please be sure to inspect and confirm settings yourself before actual use. Please purchase only if you understand used diving equipment. Thank you for viewing.