| Display | None (screen-free); single side button, data viewed in Garmin Connect app | Color OLED, 333 ppi, DCI-P3, Corning Gorilla Glass 3 |
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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) | — |
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| Battery | Up to 10 days | Up to 16 hours (328 mAh typical); about 30 minutes to 60%, about 70 minutes to 100% |
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| Charging | Garmin proprietary plug charger (lithium-ion battery) | — |
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| Memory | 128 MB history | — |
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| Water Resistance | 5 ATM (swim) | Water resistant to 50 m |
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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 | Built-in 4G LTE (Fitbit Ace Pass subscription required), Wi-Fi 802.11 b/g/n 2.4GHz, Bluetooth 5.0, NFC (Tap to Pay), GPS/GNSS |
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| Compatibility | iPhone and Android | Fitbit Ace app on Android 11 or newer or iOS 16 or newer |
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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 | — |
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| Case | — | 41.04 x 44.89 x 13.35 mm, 28.03 g without band; band fits 120-200 mm wrists |
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| Sensors | — | Accelerometer, optical heart rate sensor, altimeter, magnetometer, ambient light sensor, gyroscope |
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| Audio | — | Built-in microphone and speaker |
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| Target age | — | Kids 7 and up |
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