| Display | None - screen-free band with no buttons; data is shown in the Polar Flow app | 1.2-inch always-on transflective touchscreen with mineral glass and a night mode |
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| Body | Stainless steel sensor unit, 42 x 27 x 9 mm; 29 g with band (19.5 g without band); SoftWeave band in S/M and M/L sizes; WR30 water resistance | 11.7 mm thick; 30 g with nylon band; silicone and nylon band options; 20 mm quick-release bands |
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| Battery | Up to 8 days, 170 mAh Li-Pol, USB-C charging cable | Up to 15 days of regular use; up to 38 hours of full GPS (standard GPS mode) |
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| Sensors | Polar Precision Prime optical heart-rate sensor (OHR Gen 3.5), accelerometer; no skin temperature sensing | Optical heart rate and SpO2 sensor (5 LEDs, 4 photodetectors), barometric altimeter |
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| Tracking | 24/7 heart rate, activity, sleep and recovery tracking; Nightly Recharge, SleepWise, Sleep Plus Stages, Training Load Pro, automatic training detection | — |
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| Memory | 4 weeks of data on the band (16 MB storage) | — |
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| Connectivity | Bluetooth Low Energy (one connection, reserved for Polar Flow); no built-in GPS (uses phone GPS in Polar Flow) | Bluetooth; syncs with Strava, Nike Run Club, Apple Health and Health Connect; notifications, Find My Phone, GoPro and Insta360 control |
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| Software | Polar Flow app (free, no subscription); one-time purchase | — |
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| Colors | Greige Sand, Night Black, Brown Copper; extra bands USD 29.90 | — |
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| Positioning | — | GPS with optional dual-frequency mode, barometric altimeter, breadcrumb and turn-by-turn navigation |
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| Water Resistance | — | 5 ATM |
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| Sports | — | Run, bike, swim, strength and snow activity modes; training plans, workouts and COROS Training Hub |
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| Music | — | Built-in audio support for music (per COROS) |
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