The Xiaomi Smart Band 9 Active is a versatile fitness tracker designed to help you keep a close eye on your health and daily activity. It features a 1.47-inch TFT LCD screen with a 60Hz refresh rate and reinforced glass, providing a smooth visual experience in a compact plastic case that weighs only 16.5g without the strap. This lightweight design, complemented by a durable TPU strap, makes it comfortable for all-day wear, while the 5 ATM water resistance allows you to wear it while swimming or in the shower without worry. Inside, the band is equipped with a PPG sensor and accelerometer to provide continuous heart rate monitoring, blood oxygen saturation levels, and detailed insights into your sleep quality and stress. For those who stay active, it offers over 50 sports modes, including rowing and outdoor cycling, all synced through the Mi Fitness app. You can personalize the look with over 100 watch faces and use handy tools like music control, weather updates, and a remote camera shutter. Powering these features is a 300mAh battery that lasts up to 18 days under typical use, so you won't have to charge it frequently. When it does run low, the included magnetic cable brings it back to full power in less than two hours. It connects via Bluetooth 5.3 BLE and is compatible with most modern smartphones running Android 8.0 or iOS 12.0 and above.