CLASS C: Used condition 
The product bears clear traces of use, but has no functional defects. Accessories may be missing if the box and manual are present. 

Stylish and versatile design:

- Captivating display

• Enjoy seamless interaction with a 1.62" AMOLED display that has a peak brightness of 1200 nits, so you can see clearly even in direct sunlight.
• Experience smoother operation with a high refresh rate of 60 Hz.
  
• Equipped with a light sensor module that accurately detects ambient light to automatically adjust the screen brightness for more comfortable viewing.
  
• Avoid accidental touches when the screen is wet.
  
• Reduce accidental touches caused by sweat or rain.

- Build your own style

• Embrace elegance with our sandblasted aluminum alloy frame. Combine it with a range of stylish bracelets that let you show off your individuality with every twist of the wrist. 
• New bracelets with unique materials and colors, as well as the Xiaomi Smart Band's classic quick release mechanism, which easily adapts to your personal preferences.

- Hundreds of dials to suit your mood

• With over 200 different watch faces, you can switch between them depending on your mood, personal preferences and clothing.
  
• You can also personalize it by setting photos from your gallery.

- Delicate and compact

• The bracelet weighs 15.8 g, comfortable to wear even when you sleep.

Health is the key

• High precision, more accurate tracking

Track your health with over 150 training modes through exercise, heart rate and calories burned. Benefit from our improved heart rate and SpO2 monitoring, with an upgraded high-precision sensor that increases heart rate accuracy by 10%.

• 24h heart rate monitoring

 Automatic monitoring of excessive or low heart rates with alerts.

• 24h blood oxygen monitoring

Vibration alerts for low blood oxygen saturation. 

• 24h stress monitoring

Relaxation reminders to lower stress levels.

• Breathing training

Relieve stress through deep breathing exercises.

• Extra features for women

Track and predict your menstrual cycle.

- Sleep management, helping you sleep through the night

Benefit from our upgraded all-round sleep monitoring feature and high-precision sensors that closely monitor sleep and analyze data. Improves your sleep quality for better rest.

• Monitor your sleep quality

High-precision sensors identify sleep stages more accurately. Detailed heart rate and blood oxygen data can also be viewed.
 

• Record your long-term sleep cycle

Use the sleep cycle data in the Mi Fitness app as a reference to better understand your sleep habits and patterns.
 

• Sleep-Animal data analysis

This feature offers a comprehensive analysis of your sleep behavior based on recent data such as sleep duration, stress levels and exercise. Get a clearer understanding of your sleep patterns.
 

• Sleep tips

Tips for resting during the day are given based on your sleep data to improve your sleep habits.

- 150+ sports modes, by your side every step of the way

Track accurately whether you're outdoors or indoors. The advanced algorithms cover metrics like maximum oxygen uptake, recovery time, training results, load, etc.

• Accumulate vitality points, for more motivation

Convert your 7 days of moderate to intense activities into one point. Experience the significant health benefits by accumulating a total of 100 Vitality Points over 7 days.
 

• Running courses on your wrist

From basic running-walking to advanced aerobic endurance running, use 10 wrist running courses designed to vibrate and light up the screen, helping you reach your heart rate and pace goals.

•  Innovative wearing accessories

  The new generation Xiaomi Smart Band 9 running clip and necklace accessory with convenient attachment and removal, tracks and analyzes your performance with 13 metrics, including running pace, step length and ground contact time ratio.

• Use the running clip to wear the band on your shoes and get professional running data.
  
• Turn your band into a stylish pendant with the necklace accessory, which displays unique dials.

Excellent performance

• 21 days of battery life on a full charge

Thanks to professional low-current sensors and smart power consumption algorithms, Xiaomi Smart Band 9 has an outstanding battery life of 21 days with regular use, supporting you week after week.

•   21 days on typical battery usage.
   
•  9 days battery life in AOD mode.
   
•  6.6 days battery life in heavy load mode.

- 5 ATM water resistance

Water resistant, take it with you when you swim.

- Precision Vibration:

Feel the difference with precision vibration, powered by an upgraded linear motor and offering 20 unique vibration modes.

Product Specification

- Dimensions:

46.53 x 21.63 x 10.95 mm (Height, width and thickness excluding straps and protruding parts).
Weight: 15.8 g (without strap)

- Bracelet:

Size: 135-210 mm
Material: TPU
Color: Midnight Black | Glacier Silver | Mystic Rose | Arctic Blue

- Screen:

1.62-inch AMOLED Touch Display
Resolution: 192 x 490 pixels
Brightness: Up to 1200 nits, adjustable

- Battery:

Charging type: Magnetic charging
Charging time: Approximately 1 hour
Typical usage time: Up to 21 days
Nominal capacity: 233mAh

- Sensors:

Accelerometer / Gyroscope / Optical heart rate sensor / Ambient light sensor

- Specifications:

5ATM water resistant
App: Mi Fitness
Motor: Linear motor
Compatibility: Supports smartphones with Android 8.0 or iOS 12.0 and above

- Package contents:

Xiaomi Smart Band 9 / Magnetic charging cable / User manual