| Display | None (screen-free); single side button, data viewed in Garmin Connect app | None - screen-free band with no buttons; data is shown in the Polar Flow app |
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| Body | Module 27 x 47 x 9 mm, 14.8 g; fabric ComfortFit band, fiber-reinforced polymer case; total 20.7 g (S-M) / 21.2 g (L-XL) | 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 |
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| Battery | Up to 10 days | Up to 8 days, 170 mAh Li-Pol, USB-C charging cable |
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| Charging | Garmin proprietary plug charger (lithium-ion battery) | — |
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| Memory | 128 MB history | 4 weeks of data on the band (16 MB storage) |
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| Water Resistance | 5 ATM (swim) | — |
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| Health Sensors | Wrist heart rate, Pulse Ox, skin temperature, Body Battery, stress, respiration, sleep tracking | — |
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| Training Metrics | Training readiness, HRV status, VO2 max, training status, workout benefit, recovery time; 80+ manual activities and automatic activity detection | — |
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| Connectivity | Bluetooth, ANT+; connected GPS via smartphone | Bluetooth Low Energy (one connection, reserved for Polar Flow); no built-in GPS (uses phone GPS in Polar Flow) |
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| Compatibility | iPhone and Android | — |
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| Subscription | No subscription required for core tracking; some coaching and workout features require Garmin Connect+ | — |
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| Colors | Citron Gray, Mauve, French Gray, Dark Olive, Captain Blue, French Blue, Black | Greige Sand, Night Black, Brown Copper; extra bands USD 29.90 |
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| Sensors | — | Polar Precision Prime optical heart-rate sensor (OHR Gen 3.5), accelerometer; no skin temperature sensing |
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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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| Software | — | Polar Flow app (free, no subscription); one-time purchase |
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