| Sizes | 40 mm and 44 mm; Bluetooth and LTE variants; Green, Silver and Cream | 41mm and new 45mm |
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| Display | Super AMOLED, 480x480 (44 mm) / 432x432 (40 mm), 2,000 nits, sapphire crystal, always-on option | Actua display, up to 2,000 nits peak, down to 1 nit, 60 Hz to 1 Hz always-on; 45mm shows 40% more screen and 41mm 10% more than Pixel Watch 2 (Google claims) |
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| Chipset | Exynos W1000 (5-core, 3 nm), 1.6GHz | — |
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| RAM | 2GB | — |
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| Storage | 32GB | — |
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| Battery | Up to 40 hours (always-on display off), up to 30 hours (always-on display on); 425 mAh (44 mm), 300 mAh (40 mm), fast wireless charging | Up to 36 hours with Battery Saver Mode (Google claim); 45mm has a 35% bigger battery, 41mm charges 20% faster |
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| Body | Armor Aluminum; 44.4 x 44.4 x 9.7 mm, 33.8 g (44 mm); 40.4 x 40.4 x 9.7 mm, 28.9 g (40 mm) | — |
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| Durability | 5ATM, IP68, MIL-STD-810H | — |
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| Sensors | BioActive Sensor (optical heart rate, ECG, bioelectrical impedance), infrared skin temperature, accelerometer, barometer, gyro, geomagnetic, light | — |
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| Connectivity | Bluetooth 5.3, Wi-Fi 2.4GHz + 5GHz, NFC, dual-frequency L1+L5 GPS, optional LTE | Bluetooth/Wi-Fi and LTE models, Ultra-Wideband chip |
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| OS | Wear OS Powered by Samsung, One UI Watch; works with Android 11 or later (not iPhone) | — |
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| Software | — | Wear OS 5, Fitbit health and fitness features, six months of Fitbit Premium included |
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| Health | — | Loss of Pulse Detection, Daily Readiness, Cardio Load, Target Load, running form analysis |
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| Price | — | 349.99 dollars (41mm) and 399.99 dollars (45mm) Bluetooth/Wi-Fi; 449.99 and 499.99 dollars LTE at launch in the US |
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