| Model | Xiaomi Smart Band 9 | Xiaomi Smart Band 9 Pro | Xiaomi Smart Band 9 Active (Redmi Smart Band 3 in China) |
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| Colors | Midnight Black, Glacier Silver, Mystic Rose, Arctic Blue, Titan Gray, Graphite, Silver | Obsidian Black, Rose Gold, Moonlight Silver | Black, Beige White, Pink (Black, Beige in China) |
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| Display | 1.62" AMOLED Touch Display, Always on Display, 60 Hz | 1.74" AMOLED Touch Display, Always on Display, 60 Hz | 1.47" TFT Display, 60 Hz |
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| Brightness | Up to 1200 nits, adjustable | Maximum 1200 nits with auto brightness adjustment | Up to 450 nits, manually adjust |
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| Resolution | 192 x 490 pixels | 336 x 480 pixels | 172 x 320 pixels |
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| Glass | Reinforced glass cover | 2.5D reinforced glass | Reinforced glass cover |
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| Chassis | N/A | Aluminum alloy frame and high-strength fiber polymer | N/A |
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| Operating System | Hyper OS | Hyper OS | N/A |
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| Size (excluding the health sensor) | 46.53 x 21.63 x 10.95 mm | 43.27 × 32.49 × 10.8 mm | 45.9 x 26.94 x 9.99 mm |
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| Weight (without strap) | 15.8 g | 24.5 g | 16.5 g |
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| Strap Size | 135–210 mm | 135–205 mm | 135–215 mm |
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| Water Resistance | 5ATM |
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| Connectivity | Bluetooth 5.4 | Bluetooth 5.4, A-GPS, GLONASS, Beidou, Galileo, QZSS | Bluetooth 5.3 |
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| Sensors | *Accelerometer sensor *Gyroscope sensor *Optical heart rate sensor *Ambient light sensor | *Accelerometer *Gyroscope *Electronic compass *Optical heart rate and pulse oximeter *Ambient light sensor | *PPG sensor *Accelerometer *Motor: ERM |
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| App Support | Mi Fitness |
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| Battery | 233 mAh | 350 mAh | 300 mAh |
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