vs
7.5Display7.5
8.5Battery life8.4
4.9Health tracking9.4
6.7Sports & outdoor7.0
6.5Smart features6.5
6.6Build & durability9.6
Dimensions
Size comparison
D2 Mach 1 ProDescent Mk3i 51mm
| D2 Mach 1 Pro | Descent Mk3i 51mm | Difference | |
|---|---|---|---|
| Height | 51 mm | 51 mm | = |
| Width | 51 mm | 51 mm | = |
| Thickness | 15 mm | 16.4 mm | −1.4 mm |
| Weight | 126 g | 78 g | +48 g |
Drawn to the same scale from the official dimensions (front and side).
Why is D2 Mach 1 Pro better than Descent Mk3i 51mm?
- GPS battery life82 h vs 76 h+8%
- Battery saver mode41 days vs 31 days+32%
- Thickness15 mm vs 16.4 mm+9%
Why is Descent Mk3i 51mm better than D2 Mach 1 Pro?
- Water resistance10 ATM vs 20 ATM2×
- Weight126 g vs 77.8 g+62%
- GPS battery life (dual-band)38 h vs 48 h+26%
- Sport profiles95 vs 98+3%
Specifications
Side by side
| Design & durability | ||
| Case size | 51 mm | 51 mm |
| Weight | 126 g | 77.8 g |
| Thickness | 15 mm | 16.4 mm |
| Height | 51 mm | 51 mm |
| Width | 51 mm | 51 mm |
| Case material | Titanium | Titanium |
| Sapphire crystal | Yes | Yes |
| Lens / cover glass | sapphire crystal | sapphire crystal |
| Strap material | Titanium & silicone | silicone or DLC coated titanium |
| Water resistance | 10 ATM | 20 ATM |
| Water rating (maker) | 10 ATM | Dive (200 meters) |
| Rated dive depth | — | 200 m |
| Display | ||
| Screen size | 1.4″ | 1.4″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 454 px | 454 px |
| Resolution (height) | 454 px | 454 px |
| Pixel density | 324 ppi | 324 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 25 days | 25 days |
| Battery life with always-on display | 10 days | 10 days |
| Battery saver mode | 41 days | 31 days |
| GPS battery life | 82 h | 76 h |
| GPS battery life (dual-band) | 38 h | 48 h |
| Wireless charging | No | No |
| Charging | Garmin proprietary plug charger | Garmin proprietary clip charger |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | — |
| Skin temperature | — | Yes |
| Temperature sensor | Yes | Yes |
| HRV tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer, Ambient light sensor | GPS, GLONASS, Galileo, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer, Ambient light sensor, Depth sensor |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO | GLONASS, GALILEO |
| Offline maps | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | Yes |
| Sport profiles | 95 | 98 |
| Dive mode | — | Yes |
| LED flashlight | Yes | Yes |
| Connectivity | ||
| NFC payments | Yes | Yes |
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| ANT+ sensors | Yes | Yes |
| Smart features | ||
| Music on the watch | Yes | Yes |
| Storage | 32 GB | 32 GB |
| Third-party apps | Yes | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
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