Explore both of your worlds - underwater and topside - with the Descent Mk2 series of watch-sized dive computers. They feature multiple dive modes, such as single and multiple gas dives, gauge, apnea, apnea hunt and closed-circuit rebreather. The Descent Mk2 series comes with ABC sensors with an underwater 3-axis compass as well as surface GPS capabilities to mark your entry and exit points (1). On land, the Descent Mk2 series doubles as a premium multisport GPS smartwatch with multi-GNSS support, multiple sports apps, wrist-based heart rate monitoring (2), Pulse Ox (3) sensor, advanced training features, Garmin Pay payment service (6), music storage, smart notifications (5) for calls, texts and calendar alerts and more.Monitor your gas and depth (1) with the advanced, watch-style dive computer that comes with multisport training and smart features. Air-integrated dive computer for you and your dive buddies. Choose from multiple dive modes for your underwater adventure. Measure your performance and track your stats above water. Share and review dives in the Garmin Dive app. The battery in your Garmin device is simply unmatched by other smartwatches. Quality by Design: Advanced, watch-style dive computer with 1.4" (35.56mm) color sunlight-readable display (36% larger than previous model) in an elegant yet rugged design.Dive Modes: Get multiple dive modes for single and multiple gas dives (including nitrox and trimix), gauge, apnea, apnea hunt and closed circuit rebreather; customize or add additional screens for each dive mode that features the fields you want to see. Surface Multi-GNSS: Track your entry and exit points (1) with advanced satellite connectivity. The decompression model used is the Bühlmann ZHL-16c with gradient factors. Dive computer allows use with Air, Nitrox and Trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. PO2 is up to 2.0 with customizable deco PO2 setting. Dive Alerts and Alarms: Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching, tank pressure, gas consumption rate. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time. Three Axis Compass: There are no street signs underwater. The reef is not on the corner of third and Elm. Compass with adjustable heading, quick change to 90-degrees-R, 90-degrees-L and reciprocal. Indicates degrees and direction back to set heading. Dive Log: Store and review data for up to 200 dives and share via the Garmin Dive app: Garmin Dive app offers unlimited dive storage. Compatible with inReach Devices: Pair with inReach satellite communicators, and have peace of mind using the water-resistant dive case accessory for the inReach Mini satellite communicator (each sold separately); protects inReach Mini to a depth of 330' (100m/10 ATM). Wrist-Based Heart Rate: Optical heart rate (2) technology gauges activity intensity as well as heart rate variability to calculate your stress level; it also tracks underwater without a heart rate strap. Pulse Ox Sensor: For altitude acclimation, sleep monitoring or between apnea/apnea hunt activities on the surface, a Pulse Ox (3) sensor uses light beams at your wrist to gauge how well your body is absorbing oxygen.Sports Apps: Use preloaded activity profiles for trail running, swimming, running, biking, hiking, rowing, skiing, golfing and more. Performance Metrics: View advanced training metrics that include running dynamics (2), heat and altitude adjusted VO2 max, recovery advisor and more (2). PacePro Feature: PacePro is a first-of-its-kind feature that helps keep you on pace with grade-adjusted guidance as you run a course. Animated Workouts: Easily follow animated workouts for cardio, strength, yoga, and Pilates; view workouts right on your watch screen. Topo and Ski Maps: Use topographical maps to navigate your adventures, and view run names and difficulty ratings for 2,000 worldwide ski resorts. ABC Surface Sensors: Navigate your next trail with ABC sensors, including an altimeter for elevation data, barometer to monitor weather and 3-axis compass. All-Day Respiration: Track how you're breathing throughout the day, during sleep and during breathwork and activities such as yoga. Turn-by-Turn Navigation: Follow a route or course with help from turn-by-turn directions, which let you know ahead of time when the next turn is coming. Round-Trip Routing: Enter a distance you want to travel and get suggested routes that will bring you back to your starting point; Trendline popularity routing helps you find the best local paths.Safety and Tracking Features: If you feel unsafe or if your watch senses an incident, assistance, and incident detection features (4) send your location to emergency services. Feature not available while in dive mode. Music: Store up to 2,000 songs, or access streaming music apps from your compatible services (5), including Spotify, Deezer and Amazon Music. The Garmin Descent Mk2 Stainless Steel with black band has a domed sapphire crystal, a sunlight-visible, transflective memory-in-pixel (MIP) display with a resolution of 280 x 280 pixels. The watch bezel is stainless steel with a fiber-reinforced polymer with metal rear cover case. The Descent Mk2 comes with a silicone wrist band, measures 2 x 2 x 0.7" (52 x 52 x 17.8mm) and with the Carbon (DLC) Coated Titanium bezel and titanium band weighs 5.65 oz (160.3g) and with the stainless-steel bezel and silicone band weighs 3.66 oz (103.8g).The battery life in smartwatch mode is up to 16 days, in battery saver watch mode up to 50 days, GPS mode up to 48 hours, GPS + music mode up to 15 hours, max battery GPS mode up to 96 hours, dive mode up to 80 hours, and expedition GPS activity mode up to 35 days. Included with the Descent Mk2 are a black extra-long adjustment strap, charging/data cable and documentation.(1) GPS tracking does not work underwater(2) Activity tracking and fitness metric accuracy(3) This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition; see Garmin.com/ataccuracy. Pulse Ox not available in all countries(4) When paired with a compatible smartphone. See safety and tracking features requirements and limitations(5) May require premium subscription from a third-party music provider(6) View current supported country, payment network and issuing bank information