This is the Sherwood LOGIC Nitrox Puck-Style Wrist Computer Gauge ConsoleFeatures: Air, nitrox or gauge operating modes Altitude and temperature indication Audible and visual alarms (diver selectable) Depth alarm Imperial and metric settings Sample rate recording 15s, 30s, 45s and 60s Deep stop reminder Digital and bar graph indicators for nitrogen, oxygen limits, and ascent rate Backlight Wireless sync and downloadable to app Replaceable CR2450 battery Fits all current and past console boots The Sherwood Logic puck-style dive computer is thoughtfully crafted to meet the needs of divers seeking simplicity, and those in search of a reliable backup computer. Its user-friendly display and intuitive navigation, featuring two control buttons, makes navigating through its functions a breeze. Equipped with nitrox capability and a suitable depth rating, the Logic is adept at fulfilling the demands of recreational divers, making it a versatile and practical choice for a wide range of diving experiences.