Garmin Descent Mk3

Works with: iPhone and Android
Display: AMOLED, 1.2 in
Case sizes: 43 mm
Battery: 10 days
GPS battery: 28 hours
Weight: 53.5 g

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Garmin Descent Mk3 at a glance

Battery

Around two weeks

Up to 10 days in smartwatch mode. 28 hours with GPS.
GPS

Multi-band GPS

Maps on the wrist. Runs and rides without your phone.
Display

AMOLED, 1.2 in

1.2 in, always-on option and touchscreen.
Health

Heart, sleep and more

Measures blood oxygen, skin temperature and HRV.
Phone & smart

iPhone and Android

Payments and music.
Build

53.5 g

53.5 g. Sapphire lens.

Garmin Descent Mk3 full specifications

Overview

Brand	Garmin
Model	Descent Mk3
Series	Descent

Platform & apps

Works with iPhone and Android phones, running Garmin.

It has an app store for extra apps and watch faces.

Operating system	Garmin
Works with	iPhone and Android
Storage	32 GB
App store	Yes

Display

A vivid, high-contrast screen that is easy to read indoors and out.

1.2 in, always-on option and touchscreen.

Display type	AMOLED
Screen size	1.2 in
Resolution	390 x 390
Colour display	Yes
Always-on display	Yes
Touchscreen	Yes
Controls	touchscreen, buttons

Design & durability

A 43 mm case weighing 53.5 g.

A sapphire lens resists scratches.

Case sizes	43 mm
Case shape	Round
Dimensions	43 x 43 x 14.15 mm
Thickness	14.15 mm
Weight (case)	53.5 g
Weight with band	72.5 g
Case material	fiber-reinforced polymer with stainless steel rear cover
Bezel material	Stainless steel
Lens	Sapphire crystal
Back material	stainless steel
Band material	silicone
Band width	20 mm
Band fitting	QuickFit 20 mm
Fits wrists	128-224 mm

Battery

Around two weeks: up to 10 days in smartwatch mode.

With the always-on display, about 4 days. With GPS on, up to 28 hours, or 17 hours in multi-band mode. Real battery life depends on screen brightness, notifications and workouts.

Battery (smartwatch mode)	10 days
Battery (GPS)	28 hours
Battery (multi-band GPS)	17 hours
All battery modes	Smartwatch: 10 days; Always-on display: 4 days; Battery saver: 12 days; GPS: 28 hours; All satellite systems: 20 hours; Multi-band GPS: 17 hours; GPS: 6 hours; Max battery GPS: 44 hours
Charging	clip

GPS & navigation

Built-in multi-band GPS for accurate tracks, even near tall buildings and trees.

Maps come preloaded on the watch.

GPS	Built-in
Multi-band GPS	Yes
Satellite systems	GPS, GLONASS, Galileo
Automatic GNSS mode	Yes
Maps	Preloaded maps
Navigation features	back-to-start, round-trip routing, climb planner, waypoints
Golf courses	43,000
Ski maps	Yes

Health & sensors

Tracks heart rate around the clock, plus blood oxygen, skin temperature and HRV.

For sleep, it offers a nightly sleep score.

Sensors	optical HR, SpO2, skin temperature, accelerometer, gyroscope, barometer, compass, ambient light, thermometer, depth
Heart-rate sensor	Garmin Elevate
Heart-rate tracking	24/7
High/low heart-rate alerts	Yes
Heart-rate variability	Yes
Blood oxygen (SpO2)	Yes
Skin temperature	Yes
Respiration rate	Yes
Sleep tracking	Sleep score
Stress tracking	Yes
Energy score	Body Battery
Readiness score	Training Readiness
Cycle tracking	Yes

Safety

Has an emergency SOS feature.

SOS works through your paired phone. Live tracking lets friends follow your workouts.

Emergency SOS	Via phone
Incident detection	Yes
Live tracking	Yes

Training

Built for training, with the metrics serious athletes use.

It adds a triathlon mode, running power and daily suggested workouts.

Auto activity detection	Yes
Triathlon / multisport	Yes
Swim tracking	Pool and open water
Underwater heart rate	Yes
Training metrics	VO2 max, training load, training effect, recovery time, race predictor, endurance score, lactate threshold, HRV status
Adaptive coaching	Yes
Running dynamics	Yes
Wrist running power	Yes
Strength rep counting	Yes
Heart-rate broadcast	Yes
External sensors	ANT+, Bluetooth HR strap, power meter, foot pod, speed/cadence, bike radar/lights, golf club tags
Smart trainer control	Yes

Smart features

Smart extras include contactless payments and music storage.

Notifications	Yes
Message replies	Android
Contactless payments	Yes
Payment service	Garmin Pay
Music storage	Yes
Find my phone	Yes
Find my watch	Yes

Diving, golf & more

It works as a dive computer for multi-gas scuba.

Rated to 200 m.

Specialist modes	golf, tactical, marine, ski
Diving	Multi-gas dive computer
Max dive depth	200 m
Decompression model	Bühlmann ZHL-16c with Gradient Factors
Gases	air, nitrox, trimix

Specs compiled from Garmin's product pages and datasheets. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.