Style:Descent Mk2i Track your breath and depth with Descent Mk2i, the watch- sized dive computer. It features SubWave sor technology for integrated tank pressure monitoring on up to 5 tanks when paired with the Descent T1 transmitter (Additiol equipment (sold separately) and device pairing required), making it ideal for instructors or group dives. Descent Mk2i comes with ABC sensors with an underwater 3-axis compass as well as surface GPS capabilities to mark your entry and exit points (GPS tracking does not work underwater). On land, Descent Mk2i doubles as a premium multisport GPS smartwatch with multi-GNSS support, multiple sports apps, wrist-based heart rate monitoring estimates, Pulse Ox (this is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition) sensor, advanced training features, Garmin Pay payment service (not all countries and payment networks are eligible), music storage, smart notifications (when paired with a compatible smartphone) for calls, texts and calendar alerts and more.