The Xiaomi Smart Band 9 Series is a line of wearable activity tracker developed by Xiaomi Inc. It includes three variants: the standard Xiaomi Smart Band 9, the feature-rich Xiaomi Smart Band 9 Pro, and the budget-friendly Xiaomi Smart Band 9 Active. In China, the Xiaomi Smart Band 9 Active was released as the Redmi Smart Band 3.
Specifications + Model Xiaomi Smart Band 9 Xiaomi Smart Band 9 Pro Xiaomi Smart Band 9 Active (Redmi Smart Band 3 in China) 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) 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 Brightness Up to 1200 nits, adjustable Maximum 1200 nits with auto brightness adjustment Up to 450 nits, manually adjust Resolution 192 x 490 pixels 336 x 480 pixels 172 x 320 pixels Glass Reinforced glass cover 2.5D reinforced glass Reinforced glass cover Chassis N/A Aluminum alloy frame and high-strength fiber polymer N/A Operating system Hyper OS Hyper OS N/A 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 Weight (without strap) 15.8 g 24.5 g 16.5 g Strap size 135–210 mm 135–205 mm 135–215 mm Water resistance Connectivity Bluetooth 5.4 Bluetooth 5.4, A-GPS, GLONASS, Beidou, Galileo, QZSS Bluetooth 5.3 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 App. support Mi Fitness Battery 233 mAh 350 mAh 300 mAh
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