| Type | Screenless wearable training system (arm-worn heart-rate sensor plus waist-worn motion sensor), no display | — |
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| Sensors | Helio Core Motion HR: BioTracker 6.0 PPG optical heart-rate sensor (5PD + 2LED), accelerometer, gyroscope, temperature sensor, geomagnetic sensor. Helio Core Motion Waist: accelerometer, gyroscope, geomagnetic sensor | Accelerometer, optical heart rate sensor, altimeter, magnetometer, ambient light sensor, gyroscope |
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| Battery | Up to 11 days typical (Helio Core Motion HR), up to 40 days typical (Helio Core Motion Waist), 232 mAh cells, magnetic charger | Up to 16 hours (328 mAh typical); about 30 minutes to 60%, about 70 minutes to 100% |
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| Water Resistance | 5 ATM | Water resistant to 50 m |
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| Connectivity | Bluetooth 5.2 (BLE) | 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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| Weight | 11.4 g (Helio Core Motion HR), 10.7 g (Helio Core Motion Waist) | — |
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| Sports Modes | More than 50 sports modes via the Zepp App, HYROX Race and Simulation support | — |
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| Compatibility | Android 8.0 and above, iOS 17.0 and above via the Zepp App; HYROX modes require Amazfit Balance 3 or Balance Ultra at launch | Fitbit Ace app on Android 11 or newer or iOS 16 or newer |
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| In the Box | Helio Core Motion HR, Helio Core Motion Waist, Helio Pro Clip, wristband, armband, magnetic charging head | — |
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| Subscription | No monthly subscription required | — |
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| Display | — | Color OLED, 333 ppi, DCI-P3, Corning Gorilla Glass 3 |
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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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| Audio | — | Built-in microphone and speaker |
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| Target age | — | Kids 7 and up |
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