Garmin Descent™ Mk3i 51 mm

Sleep Score and Insights
Yes

Battery life (smartwatch mode)
Up to 25 days (10 days always-on)

Built-in mapping
Yes

Pulse Ox Blood Oxygen Saturation
Yes

LED flashlight
Yes

Garmin Pay™
Yes

Multi-band GPS
Yes

Music storage
Yes

Training Readiness
Yes

Training Status
Improved

Watch display type
AMOLED

Touchscreen
Yes

Water rating
Dive (200 metres)

Strap material
Silicone or DLC coated titanium

Lens material
Sapphire crystal

Bezel material
Diamond-like Carbon (DLC) coated titanium

Case material
Fibre-reinforced polymer with titanium rear cover

QuickFit™ watch band compatible
Yes (26 mm)

Physical size
51 x 51 x 16.4 mm
Fits wrists with the following circumference:

Silicone band: 135-230 mm
Extra long silicone band: 135-355 mm
Titanium bracelet: 135-220 mm

Weight
No bands: 77.8 g
Silicone band: 105.6 g
Titanium band: 165.9 g

Leakproof inductive buttons
Yes

Display Size
35.56 mm (1.4”) diameter

Display Resolution
454 x 454 pixels

Colour display
Yes

Large font option
Yes

Battery life
Smartwatch: Up to 25 days (10 days always-on)
Battery saver watch mode: Up to 31 days
GPS Only: Up to 76 hours (56 hours always-on)
All Satellite Systems: Up to 55 hours (43 hours always-on)
All Satellite Systems + Multi-band: Up to 48 hours (38 hours always-on)
All Satellite Systems + Music: Up to 17 hours
Max Battery GPS: Up to 118 hours
Expedition GPS: Up to 24 days
Dive mode: up to 66 hours
Dive Mode with Air Integration: Up to 40 hours

Charging method
Garmin proprietary clip charger

Memory/history
32 GB

Time/date
GPS time sync
Automatic daylight saving time
Alarm clock
Timer
Stopwatch
Sunrise/sunset times

Wrist-based heart rate (constant, every second)
Resting heart rate
Abnormal Heart Rate Alerts Yes (high and low)
Respiration Rate
Fitness Age Yes (in app)
Body Battery™ Energy Monitor
All-day Stress
Relaxation Breathing Timer
Breathwork
Sleep Yes (Advanced)
Nap detection
Hydration Yes (in Garmin Connect™)
Women’s Health Yes (in Garmin Connect™)
Health Snapshot
Skin temperature
JET LAG ADVISER

GPS
GLONASS
Galileo
SatIQ™ Technology
Garmin Elevate™ wrist heart rate monitor
Pulse Ox Blood Oxygen Saturation Monitor
Barometric altimeter
Compass
Gyroscope
Accelerometer
Thermometer
Ambient light sensor
Depth sensor

Connectivity Bluetooth®, ANT+®, Wi-Fi®, SubWave™
Connect IQ™ (downloadable watch faces, data fields and apps)
On-device Connect IQ™ Store
Smart Notifications
Text response/reject phone call with text (Android™ only)
View images from notifications on watch (Android™ only)
Morning report
Calendar
Weather forecasts
Realtime settings sync with Garmin Connect™ mobile
Battery Saver – customisable low power watch
Controls smartphone music
Plays and controls watch music
Find my phone
Find my watch
Find My Phone during GPS activity
Compatible with Garmin Messenger app
VIRB® camera remote
Smart trainer control
Compatible with Garmin Connect™ Mobile
Smartphone compatibility iPhone®, Android™
Stocks
Red shift mode
Garmin Share

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
On-screen workout animations
On-Screen Workout Muscle Map

Gym
Strength, HIIT, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor rowing

Multisport
Triathlon, Swimming/Running

WELLNESS
Walking, Pilates, Yoga, Indoor Walking

INDOOR RUNNING
Treadmill Running, Indoor Track Running

Outdoor running
Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Course

Outdoor recreation
Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery

Cycling
Biking, Road biking, Mountain Biking, Gravel biking, Bike commuting, Bike touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX

Swim
Pool Swimming, Open Water Swimming

On the water
Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Sail Racing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Sailing Expedition, Whitewater, Snorkeling

Motor sports
Motorcycling, Overlanding, Motorcrossing, ATVing, Snowmobile

Racket sports
Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball

Snow & Winter
Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing

Sport profiles
Basketball, Volleyball, Field Hockey, Ice Hockey, Soccer, Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball

In the ring
Boxing, Mixed martial arts

Other activity profiles
Jumpmaster, Tactical, Inline Skating

Incident Detection during select activities
Incident detection alert on phone for wearables
Assistance
Live Event Sharing

Ballistics solver Yes (unlock required)
Dual grid coordinates
KILL SWITCH
Night vision mode
Stealth mode
XERO™ Locations

Gaming activity
GameOn™ app compatible

Dive activity maximum operating depth
200 metres

Single-gas mode
Yes

Multi-gas mode
Yes

Gauge mode
Yes

APNOEA mode
Yes

APNOEA hunt mode
Yes

Decompression model
Bühlmann ZHL-16c with gradient factors

Nitrox support
Yes

Trimix support
Yes

Closed Circuit Rebreather (CCR)
Yes

Gas mixes
Air, Nitrox and Trimix up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gases

PO2
Up to 2.0 with customisable deco PO2 setting

Subwave™ Support
Yes

Air integration
Yes (via Subwave™)

Number of transmitters supported
8

Gas time remaining
Yes

Gas consumption rate
Yes

Auto start/end dive
Yes

Custom end-dive timeout
Yes (20s to 10 m)

Safety Stop
Yes (customisable off/3min/5min)

Deep Stops
Yes (using custom gradient factors)

Customisable conservatism
Yes (low/medium/high or custom using gradient factors)

Dive ascent/descent rate indicator
Yes

Automatic altitude adjustment
Yes

No fly time
Yes

Dive planner
Yes (basic NDL + multi-gas deco planner)

Tides
Yes

Backlight
Yes (configurable time and intensity; auto-on at depth)

Automatically saves dive entry and exit locations
Yes

Sync dive log to Garmin Dive™ Mobile app
Yes

Custom dive data screens
Yes

Alerts & alarms
Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching. Customisable (up to 40) audible and/or vibration per dive mode, based on depth or time

3-axis dive compass
Yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading

Missed Deco Lockout
Yes (can be disabled prior to dive with user acknowledgement)

Residual Tissue Loading Reset
Yes (on the surface with user acknowledgement)

Surface diver status widget
Yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status)

Available boating profiles
Boating, Sailing, Sail Racing

Anchor Alarm
Yes

Autopilot control
Yes

Boat data streaming
CIQ

Virtual starting line
Yes

Countdown timer
Yes

Tack assist mode
Yes

Built-in barometer and tide tables
Yes (downloadable tides)

Wearable trolling motor remote
Yes

Step counter
Move alerts (displays on device after a period of inactivity; walk for a couple of minutes to reset it)
Auto goal (learns your activity level and assigns a daily step goal)
Calories Burned
Floors climbed
Distance travelled
Intensity minutes
TrueUp™
Move IQ™
Garmin Connect™ Challenges app Yes (optional Connect IQ app)
Automatic rep counting

Customisable screen(s)
Downloadable training plans
Course guidance
HR Zones
HR Alerts
HR Calories
% HR Max
% HRR
Recovery Time
Auto Max HR
Race glance/widget
HRV Status
HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels) Yes (with compatible accessory)
HR Broadcast (broadcasts HR data over ANT+® to paired devices)
Respiration Rate (During Exercise) Yes (with compatible accessory)
GPS speed and distance
Customisable activity profiles
Auto Pause® automatic timer halt
Interval training
Improved interval (includes open repeats, intervals data page, rest screen and auto detection)
Advanced workouts
Power Modes – customisable in-activity battery settings
HRM running pace and distance
Auto Lap® interval tracking feature
Manual lap
Rest timer
Configurable lap alerts
Heat and Altitude Acclimation
VO2 Max (Run)
VO2 Max (Trail Run)
Realtime Stamina
ENDURANCE SCORE
Load ratio
Training Load
Training load focus
Training Effect
Training Effect (Anaerobic)
Primary benefit (Training Effect labels)
Improved Recovery Time
Customisable alerts
Voice alerts
Finish time
Virtual partner
Race an activity
Multi-sport
Garmin Live Segments
Strava Live Segments
Round-trip course creator (running/cycling)
Trendline™ Popularity Routing
Touch and/or button lock
Shortcuts
Auto scroll
Activity history on watch
Physio TrueUp
Unified Training Status

Toe-to-Toe™ Challenges app