| Display | 1.39-inch AMOLED touchscreen, 454 x 454, 326 ppi, sapphire crystal glass, always-on option, ambient light sensor | 1.28-inch AMOLED touchscreen, 416 x 416, Gorilla Glass 3, always-on option with ambient light sensor |
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| Body | 48.6 x 48.6 x 13.4 mm; 79 g with wristband (57 g without); stainless steel case and bezel; 22 mm quick-release wristbands; WR100 water resistance; MIL-STD-810H tested; -20 to 50 C operating temperature | 44.7 x 44.7 x 12.2 mm; 53 g with wristband (35 g without); glass-fibre reinforced plastic case with stainless steel bezel; 22 mm quick-release silicone wristband; WR50 water resistance |
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| Battery | Up to 11 days in smartwatch mode; up to 40 hours in performance training mode; up to 110 hours in eco training mode; 488 mAh rechargeable Li-Pol battery (Polar's launch announcement quoted up to 10 days, 43 hours and 140 hours) | Up to 7 days in smartwatch mode; up to 30 hours in training mode (Polar's spec table lists 27 hours performance, 90 hours eco and 8 days smartwatch); 310 mAh replaceable Li-Pol battery |
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| Storage | 32 GB for training data, offline maps and routes | 32 GB (offline maps), 37 MB memory, 275 MHz CPU |
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| Sensors | Polar Elixir biosensing: 4th-generation optical heart rate, wrist-based ECG, SpO2, nightly skin temperature; barometer, magnetometer compass, accelerometer, gyroscope | Polar Elixir biosensing: 4th-generation optical heart rate, wrist-based ECG, SpO2, nightly skin temperature; barometer, magnetometer compass, accelerometer, gyroscope |
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| GPS | Dual-frequency GPS with GLONASS, Galileo, BeiDou and QZSS | Dual-frequency GPS (L1/L5) with GLONASS, Galileo, BeiDou and QZSS |
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| Navigation | Preloaded maps of Europe and North America, downloadable regions and contour maps in Polar Flow, Breadcrumbs, turn-by-turn navigation powered by komoot, Strava route sync, Track Back, Back to Start | Preinstalled and upgradeable offline topographic maps, planned routes, breadcrumbs, komoot turn-by-turn guidance |
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| Connectivity | Bluetooth LE, USB-C charging cable (proprietary connector) | Bluetooth LE (no ANT+), USB-C charging cable (proprietary connector) |
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| Software | Polar Flow app; Training Load Pro, Recovery Pro, Nightly Recharge, SleepWise, FitSpark, FuelWise, Hill Splitter, orthostatic and running tests | PolarOS; Polar Flow app; Training Load Pro, Nightly Recharge, Smart Coaching; over 150 sport profiles |
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| Extras | Built-in flashlight; wrist-based running power; vertical speed, VAM and 3D speed | — |
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| Colors | Night Black, Stone-Gray; Grit X2 Pro Titan edition with titanium front casing and an extra leather wristband | Night Black, Greige Sand |
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