| Display | 1.62" AMOLED touchscreen, 192x490, 60Hz, up to 1,200 nits | 1.72" AMOLED touchscreen, 212x520, 60Hz, up to 1,500 nits (HBM), 2.0 mm bezels |
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| Body | 46.53 x 21.63 x 10.95 mm (without strap and sensor), 15.8 g without strap; aluminium alloy frame with TPU strap; fits 135-210 mm wrists | 46.57 x 22.54 x 10.95 mm (without sensor), 15.95 g without strap; aluminium alloy frame with TPU strap; Ceramic Edition 23.05 g; fits 135-210 mm wrists |
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| Battery | Up to 21 days (typical use), up to 9 days with always-on display, up to 6.6 days heavy use; 233 mAh, magnetic charging in about 1 hour | Up to 21 days (typical use), up to 9 days with always-on display, up to 8 days heavy use; 233 mAh, magnetic charging in about 1 hour |
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| Sensors | Accelerometer, gyroscope, optical heart-rate sensor, ambient light sensor | Accelerometer, gyroscope, compass, optical heart-rate and SpO2 sensor, ambient light sensor |
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| Durability | 5 ATM water resistance | 5 ATM water resistance |
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| Sports | 150+ sports modes, all-day heart rate, blood oxygen, stress and sleep monitoring | 150+ sports modes, real-time heart rate while swimming, heart rate broadcast |
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| OS | Mi Fitness app; compatible with Android 8.0+ and iOS 12.0+ | Mi Fitness app; compatible with Android 8.0+ and iOS 14.0+ |
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| Colors | Midnight Black, Glacier Silver, Mystic Rose, Arctic Blue, Titan Gray | — |
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| Connectivity | — | Bluetooth 5.4 |
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