Garmin Descent G1 Sapphire GPS Dive Smartwatch

What You'll Love Sleep score and insights Battery life (smartwatch mode) Up to 21 days Pulse Ox blood oxygen (spot-check, during sleep, all day) Garmin Pay Training status Display type Monochrome, sunlight-visible, transflective memory-in-pixel (MIP) Water rating Dive (100 meters) General Strap material silicone Lens Material sapphire crystal Bezel Material fiber-reinforced polymer Case material fiber-reinforced polymer QuickFit watch band compatible (22 mm) Physical size 45.5 x 45.5 x 15.2 mm Silicone Band: 128-224 mm Extra Long Silicone Band: 128-373 mm Weight 61 g Display Size custom, two-window design: 0.9” x 0.9” (23 x 23 mm) Display resolution 176 x 176 pixels Battery life Dive Mode: Up to 25 hours Smartwatch: Up to 21 days Battery Saver Watch Mode: Up to 48 days GPS: Up to 26 hours Max Battery GPS Mode: Up to 56 hours Expedition GPS Activity: Up to 27 days Charging method Garmin proprietary clip charger Memory/History 32 MB Clock Features Time/date GPS Time Sync Automatic daylight saving time Alarm clock Timer Stopwatch Sunrise/sunset times Health & Wellness Monitoring Wrist-based heart rate (constant, every second) Resting heart rate Abnormal heart rate alerts (high and low) Respiration rate Fitness age Body Battery energy monitor All-day stress Relaxation breathing timer Breathwork Sleep Hydration (in Garmin Connect) Women's health (in Garmin Connect) Health snapshot Sensors GPS GLONASS Galileo Garmin Elevate wrist heart rate monitor Pulse Ox Blood Oxygen Saturation Monitor Barometric altimeter Compass Gyroscope Accelerometer Thermometer Depth sensor Daily Smart Features Connectivity Bluetooth, ANT+ Connect IQ (downloadable watch faces, data fields and apps) Smart Notifications Text response/reject phone call with text (Android only) Calendar Weather forecasts Battery saver (customizable low power watch) Controls smartphone music Find My Phone Find My Watch VIRB Remote Smart trainer control Pairs with Garmin Connect Mobile Smartphone compatibility iPhone, Android Workout and Training Plans Daily Suggested Workout - Running (Pace and Heart Rate Based) Daily Suggested Workout - Cycling (Pace and Heart Rate Based) Garmin Running Coach Garmin Running Coach Experts Garmin Cycling Coach Garmin Coach - Prebuilt Cycling Plans Cardio workouts Strength workouts HIIT workouts Yoga workouts Pilates workouts Activity Profiles Gym Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing Multisport Swimming/Running Wellness Walking, Pilates, Yoga Indoor running Treadmill Running, Indoor Track Running Outdoor running Running, Trail Running Outdoor recreation Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding Cycling Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking Swim Pool Swimming, Open Water Swimming On the Water Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating Racket sports Tennis Snow & winter Skiing, Snowboarding, XC Classic Skiing, Snowshoeing Other activity profiles Tactical Safety and Tracking Features Incident Detection during select activities Assistance Tactical Features Dual grid coordinates XERO Locations Diving Features Dive activity maximum operating depth 100 meters Single-gas mode Multi-gas mode Gauge mode APNEA mode APNEA hunt mode Decompression model Bühlmann ZHL-16c with gradient factors Nitrox support Trimix support Closed Circuit Rebreather (CCR) Gas mixes Air, Nitrox and Trimix up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. PO2 Up to 2.0 with customizable deco PO2 setting Auto start/end dive Custom end-dive timeout (20s to 10 m) Safety Stop (customizable off/3min/5min) Deep Stops (using custom gradient factors) Customizable conservatism (low/medium/high or custom using gradient factors) Dive ascent/descent rate indicator Automatic altitude adjustment No fly time Dive planner (basic NDL + multi-gas deco planner) Tides Backlight (configurable time and intensity; auto-on at depth) Automatically saves dive entry and exit locations Sync dive log to Garmin Dive Mobile app Custom dive data screens Alerts & alarms Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time 3-axis dive compass (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading Missed Deco Lockout (can be disabled prior to dive with user acknowledgement) Residual Tissue Loading Reset (on the surface with user acknowledgement) Surface diver status widget (surface interval, N2/HE loading, CNS, OTU and tissue compartment status) Boating Features Available Boating Profiles Boating Built-in barometer and tide tables Activity Tracking Features Step counter Move alerts (displays on device after a period of inactivity) Auto goal (learns your activity level and assigns a daily step goal) Calories burned Floors climbed Distance traveled Intensity minutes TrueUp Move IQ Garmin Connect Challenges app (optional Connect IQ app) Automatic rep counting Training, Planning and Analysis Features Customizable data pages Downloadable training plans Course guidance HR zones HR alerts HR calories % HR max % HRR Recovery time Auto max HR HR broadcast (broadcasts HR data over ANT+ to paired devices) (using ANT+) Respiration rate (during exercise) GPS speed and distance Customizable activity profiles Auto Pause automatic timer halt Interval training Advanced workouts Power Modes - customizable in-activity battery settings Auto Lap interval tracking feature Manual lap Configurable lap alerts Heat and altitude acclimation VO2 Max (Run) VO2 Max (Trail Run) Training load Training effect Training effect (anaerobic) Primary benefit (Training Effect labels) Improved recovery time Custom alerts Voice alerts Finish time Virtual Partner Race an Activity Manual multisport activities Touch and/or button lock Shortcuts Auto scroll Activity history on watch Physio TrueUp Unified training status Running Features GPS-based distance, time and pace Running dynamics (with compatible accessory) Vertical oscillation and ratio (with compatible accessory) Ground contact time and balance (with compatible accessory) Stride length (real time) (with compatible accessory) Cadence (provides real-time number of steps per minute) Performance condition Lactate threshold (with compatible accessory) Run workouts Trail run auto climb Race predictor Foot pod capable Run/Walk/Stand detection Golfing Features Yardage to F/M/B (distance to front, middle and back of green) Yardage to layups/doglegs Measures shot distance (calculates exact yardage for shots from anywhere on course) manual Digital scorecard Stat tracking (strokes, putts per round, greens and fairways hit) Garmin AutoShot Auto CourseView updates Green View with manual pin position Hazards and course targets PinPointer Round timer/odometer CT10 Automatic club tracking compatible (requires accessory) Pairs with Garmin Golf app Tournament legal Outdoor Recreation Point-to-point navigation Bread crumb trail in real time Back to start TracBack UltraTrac mode Elevation profile Distance to destination Barometric trend indicator with Storm Alert Vertical speed Total ascent/descent Future elevation plot GPS coordinates Sight 'N Go Area calculation Projected waypoint Sun and moon information Expedition GPS Activity Tides Cycling Features Courses Bike lap and lap maximum power (with power sensor) Race an activity Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) FTP (Functional Threshold Power) MTB Grit & Flow Compatible with Vector and Rally (power meters) Compatible with Varia radar (rear-facing radar) Compatible with Varia lights Speed and cadence sensor support (w/sensor) Power meter compatible Swimming Features Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) Drill logging (pool swim only) Basic rest timer (up from 0) (pool swim only) "Repeat on" rest timer (pool swim only) Auto rest (pool swim only) Time and distance alerts Countdown start (pool swim only) Pool swim workouts Underwater wrist-based heart rate Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) Kid Activity Tracking Features Toe-to-Toe Challenges app (optional Connect IQ Toe-to-Toe Challenges app)