Feature
1. 50 meters waterproof: waterproof level 5ATM (equivalent to 50 meters underwater). It can be worn in swimming pools, shallow water swimming and other shallow water activities, but it is not suitable for hot baths, saunas and deep diving. Water activities should avoid direct impact of high-speed water flow: the waterproof function is not permanent and may weaken over time.
2. The peak brightness of the AMOLED display reaches 1200nits, and the information is still easily visible under the strong sun. Equipped with a photosensitive module, it accurately senses the ambient light and intelligently adjusts the display brightness for a more comfortable viewing experience.
3. High-precision sensors monitor data more accurately. Support automatic monitoring of heart rate, blood oxygen saturation detection and pressure monitoring.
4. Through high-precision sensors, accurate monitoring and data recording and analysis of sleep are carried out, and professional organizations are teamed up to provide more sleep suggestions to further improve your sleep quality.
5. Thanks to professional low-power sensors and intelligent power consumption algorithms, Xiaomi Mi Band 9 Pro has achieved a breakthrough in the long battery life of 21 days of regular use.

Specification
1. Weight: about 24.5g (without wrist strap)
2. Size: 43.27x32.49x10.8mm
3. Screen size and type: 1.74-inch AMOLED color square screen
4. Screen resolution: 336x480, supports full-screen touch operation
5. Screen brightness: 1200nit, supports automatic brightness adjustment
6. Cover material: 2.5D tempered glass cover
7. Shell material: aluminum alloy middle frame + fiber high-strength polymer
8. Sensor: acceleration sensor, gyroscope sensor, optical heart rate and blood oxygen sensor, ambient light sensor, geomagnetic sensor
9. Waterproof level: 5ATM
10. Data connection: support GNSS, support NFC, Bluetooth 5.4
11. Vibration motor: linear motor
12. Battery capacity: 350mAh
13. Charging time: about 75min
14. Adjustable wristband length: 135-205mm, material: TPU
15. System language: Simplified Chinese, Traditional Chinese, English
16. Supported systems: Android 8.0 or iOS 12.0 and above
17. Supporting APP: Xiaomi Sports Health

Functions
1. Health: supports daily activity recording, heart rate monitoring, blood oxygen monitoring, sleep monitoring, stress monitoring, female menstrual cycle reminder, breathing training
2. Sports: supports 150+ sports modes, running courses, body boxing courses, and full dance
3. Gadgets: supports music control, alarm clock, timer, stopwatch, flashlight, weather, card wallet, schedule reminder, to-do, offline payment, mobile phone search, world clock, tomato timer, remote control photography, Mijia, Xiaoai classmate