Garmin D2 Mach 2 51 mm

Quick details

Released

October 2025

Dimensions

51 x 51 x 14.7 mm

Operating system

Garmin proprietary

Display 1.4 inches AMOLED, 454 x 454 pixels

Battery life Up to 26 days smartwatch mode; up to 58 hours Fly activity

Water resistance 10 ATM; Dive (40 m)

GPS Yes

Sensors Optical heart rate, Pulse Ox, GPS, GLONASS, GALILEO, Barometric altimeter, Compass, Temperature sensor, Microphone, Speaker, LED flashlight

Links Amazon Garmin

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Technical specifications

General

Release date October 2025

Product type Premium aviator smartwatch

Physical size 51 x 51 x 14.7 mm

Weight 92 g with silicone band; 64 g case

Material Fiber-reinforced polymer case with titanium bezel and sapphire crystal

Water resistance 10 ATM; Dive (40 m)

Display type AMOLED touchscreen

Display size 1.4 inches (35.56 mm) diameter

Display resolution 454 x 454 pixels

Display protection Sapphire crystal

Battery Rechargeable lithium-ion battery

Battery life Up to 26 days smartwatch mode; up to 58 hours Fly activity

Charging Garmin proprietary charging/data cable

Sensors

GNSS type GPS + GLONASS + GALILEO + QZSS

GPS Yes

GALILEO Yes

GLONASS Yes

QZSS Yes

Beidou No

Accelerometer Yes

Gyroscope Yes

Barometric altimeter Yes

Compass Yes

Geomagnetic No

Ambient light sensor Yes

Optical heart rate Yes

Electrical heart rate Yes

SpO2 Yes

Temperature Yes

Galvanic skin response No

Microphone Yes

Speakers Yes

Vibration motor Yes

Health & activity tracking

Steps Yes

Distance Yes

Calories burned Yes

Floors Yes

Sports tracking Yes

Sleep Yes

Heart rate Yes

HRV Yes

Stress Yes

Blood oxygen Yes

Respiration rate Yes

Skin temperature Yes

ECG Yes (Garmin ECG App; region dependent)

Blood pressure No

Body composition No

Glucose No

Hydration level No

UV exposure No

Calorie intake No

Hyperglycemia risk assessment No

Arterial stiffness detection No

Pulse wave arrhythmia analysis No

Daily smart features

Smartphone compatibility Android, iPhone

Operating system at launch Garmin proprietary

Storage 32 GB

Bluetooth Yes

Wi-Fi Yes

NFC / connected pay Yes

UWB No

Cellular No

Smartphone notifications Yes

Bluetooth calling Yes

Smartphone music control Yes

On-board music storage Yes

Voice assistant No

Garmin performance & training

Body Battery Yes

Training Readiness Yes

Training Status Yes

Training Load Focus Yes

Endurance Score Yes

Hill Score Yes

Real-Time Stamina Yes

Running Tolerance No

Running Economy No

Step Speed Loss No

Performance Condition Yes

PacePro Yes

ClimbPro Yes

Jet Lag Adviser Yes

Daily Suggested Workouts Yes

Race Widget Yes

Morning Report Yes

Garmin Coach Yes

Garmin golf

Golf course maps No

Green View No

Hazard View No

Garmin AutoShot No

PlaysLike Distance No

PinPointer No

Touch Targeting No

Virtual Caddie No

Green Contours No

Club tracking compatibility No

Swing Tempo No

Tempo Training No

Garmin tactical

Stealth Mode No

Kill Switch No

Jumpmaster No

Night Vision compatibility No

Applied Ballistics No

Garmin aviation

Direct-to/Nearest airport navigation Yes

Aviation maps Yes

METAR/TAF weather Yes

NEXRAD radar Yes

Automatic flight logging Yes

Garmin Pilot flight-plan transfer Yes

Garmin diving

Dive modes Yes (single-gas scuba and apnea)

Air integration No

SubWave networking No

Dive Readiness No

DiveView maps No

Diver-to-diver messaging No

Garmin marine

Chartplotter connectivity No

Autopilot control No

Fusion-Link No

Boat data streaming No

Tide data No

Garmin ecosystem

Connect IQ Yes

Built-in inReach No

Links

Affiliate link Amazon, Garmin

These technical specs are correct to the best of our knowledge at the time of publishing.