The Vyper dive computer, by Suunto, is the next generation of wireless air integration and computer technology. It allows you to monitor your tank pressure and air consumption from your wrist or your console; you choose the location. Its 3-D compass will quickly become your new best friend; its ability to give a true reading, even at a 45 degree angle, will make keeping your heading easier than ever if you use enriched air, you can program the Vyper Novo for 3 gas mixtures in 1% increments for nitrox mixtures (21-99% oxygen). The Vyper Novo uses the Suunto Deep Stop RGBM algorithm that offers continuous decompression reading and offers an optimal ascent time. The goal of Suunto is to keep you safe; with that in mind, they included the deep stop option as part of the Vyper. The deep stop option includes additional stops between the diver's maximum depth and ceiling to allow divers to off gas safely while making an ascent. The computer has a 42 hour of diving logbook memory. The Viper has an enlarged segment matrix screen, excellent contrast and information with bigger and clearer digits for depth, no-decompression etc., and a new 4 button interface for easier more intuitive diver use. The Computer can be set for imperial (feet) or metric (meter) measurements. The Vyper has multiple dive modes including Air, Nitrox (up to 3 mixtures), Gauge, and Free Dive. The Vyper incorporates an improved easier to read display with an enlarged matrix screen that offers better contrast and readability. The modified design improves intuitiveness by integrating 4 button navigation - the same as the D-Series - as well as the more reliable D-Series pressure sensor. Features: Free Dive Mode Apnea Timer Added 1 to 3 gases (up to 99% O2) Air, Nitrox, Gauge, Free and Off Battery housing reliability improved