Wristband activity tracker Xiaomi Smart Band 9

The Xiaomi Smart Band 9 is a wristband activity tracker with a 4.11 cm (1.62") oval display offering a sharp 192 × 490 pixel resolution and high peak brightness of 1200 cd/m². Designed for everyday wear, the band features an optical heart rate sensor and a lightweight construction — the device weighs approximately 15.8 g and has a compact footprint (about 21.6 mm width and 46.5 mm depth). A 233 mAh battery provides up to 21 days of typical use and reaches a full charge in around 1 hour.

Advantages

The large, high-contrast display improves readability for notifications, time and health data. Low weight and streamlined dimensions make the tracker comfortable for continuous wear, including during sleep. The optical heart rate sensor enables constant heart rate monitoring, while long battery life reduces the need for frequent charging. Fast charging capability restores the battery quickly when needed.

Suitable for

• Daily activity tracking and step counting
• Sleep monitoring and overnight wear
• Continuous heart rate monitoring during rest and exercise
• Receiving notifications and quick status checks on the wrist

Key specifications

• Display: 4.11 cm (1.62") oval AMOLED, 192 × 490 pixels, up to 1200 cd/m² brightness
• Sensors: optical heart rate sensor
• Battery: 233 mAh, up to 21 days typical usage, full charge in ~1 hour
• Dimensions: approximately 21.6 mm (width) × 46.5 mm (depth)
• Weight: ~15.8 g
• Color: rose

How to use

Attach the Xiaomi Smart Band 9 to the wrist so the sensor area maintains contact with the skin. Use the companion mobile app to pair the device with your smartphone via Bluetooth and adjust display, notification and health-tracking settings. Wear the band continuously for uninterrupted activity and sleep tracking; remove it for swimming or showering only if water-resistance limits require it. Charge the band using the supplied charger or compatible charging cradle until the battery indicator shows full.

Recommendations

For accurate heart rate and sleep monitoring, wear the band snugly but comfortably on the top of the wrist, and keep firmware and the mobile app up to date. Charge the device before long trips or extended activity periods to maintain continuous tracking.