Xiaomi Watch S4 Aluminium 41mm Waterproof with Heart Rate Monitor (White)

The Xiaomi Watch S4 stands out with an interchangeable bezel, premium design, and a high-brightness AMOLED display. With HyperOS 2, GPS, Bluetooth calling, 150+ sports modes, and up to 15 days of battery life, it is the ultimate smartwatch for any occasion.

See here for a comparison of the features of the two models.

The Xiaomi Watch S4 stands out with an interchangeable bezel, premium design, and a high-brightness AMOLED display. With HyperOS 2, GPS, Bluetooth calling, 150+ sports modes, and up to 15 days of battery life, it is the ultimate smartwatch for any occasion.

See here for a comparison of the features of the two models.

What's New with the Xiaomi Watch S3

The brightness of the Watch S4’s display is significantly improved, reaching up to 1500 nits compared to the Watch S3’s 600 nits, enhancing visibility in bright environments.

The Watch S3 uses two level buttons for navigation, while the Watch S4 replaces one button with a rotating crown, offering a more intuitive and smoother scrolling experience through the menus.
The Watch S4 is upgraded to Bluetooth 5.3 from the Watch S3’s Bluetooth 5.2, providing more stable and efficient connections with lower battery consumption.

See here for a comparison of the features of the two models.

Why choose it

Interchangeable Bezel (Bezel Design): This is its “magical” feature. You don’t just change the strap, but the entire bezel around the screen. As soon as you snap on a new bezel, the watch automatically recognizes it and changes the watch face to perfectly match your new style!
1.32″ AMOLED Display with 1500 nits: The 2026 display is brighter than ever. The colors “pop” out of the crystal, and using it under the intense Greek sun is now a pleasure, not a challenge.
HyperOS 2.0: Xiaomi’s new operating system makes the watch fly. The connection with your phone (especially if you have a Xiaomi) is instantaneous, and notifications now arrive more cleverly organized than ever before.

Health & Technology

98.5% Accuracy in Heart Rate: With the new sensor, measurements approach the accuracy of medical chest bands.
Dual-Band GNSS (5 Systems): For those who run in the city, GPS locks in seconds and doesn’t lose your route among tall buildings.
AI Sleep Tracking: Provides you with a complete analysis of your sleep quality and suggests ways to wake up with more energy.

Battery: Forget the Charger

8 Days Battery Life: With typical use, the Watch S4 lasts for 8 days.
Fast Charging: 5 minutes of charging is enough for 2 full days of use.

Smart Functions that Make Life Easier

Bluetooth Calling: Crystal clear call sound thanks to the upgraded microphone with noise cancellation.
NFC Payments: Pay for your coffee simply by bringing your watch close to the POS (via Xiaomi Pay).
Gesture Control: You can perform certain functions (such as rejecting a call) just by moving your wrist.

What's New with the Xiaomi Watch S3

The brightness of the Watch S4’s display is significantly improved, reaching up to 1500 nits compared to the Watch S3’s 600 nits, enhancing visibility in bright environments.

The Watch S3 uses two level buttons for navigation, while the Watch S4 replaces one button with a rotating crown, offering a more intuitive and smoother scrolling experience through the menus.
The Watch S4 is upgraded to Bluetooth 5.3 from the Watch S3’s Bluetooth 5.2, providing more stable and efficient connections with lower battery consumption.

See here for a comparison of the features of the two models.

Why choose it

Interchangeable Bezel (Bezel Design): This is its “magical” feature. You don’t just change the strap, but the entire bezel around the screen. As soon as you snap on a new bezel, the watch automatically recognizes it and changes the watch face to perfectly match your new style!

1.32″ AMOLED Display with 1500 nits: The 2026 display is brighter than ever. The colors “pop” out of the crystal, and using it under the intense Greek sun is now a pleasure, not a challenge.

HyperOS 2.0: Xiaomi’s new operating system makes the watch fly. The connection with your phone (especially if you have a Xiaomi) is instantaneous, and notifications now arrive more cleverly organized than ever before.

Health & Technology

98.5% Accuracy in Heart Rate: With the new sensor, measurements approach the accuracy of medical chest bands.

Dual-Band GNSS (5 Systems): For those who run in the city, GPS locks in seconds and doesn’t lose your route among tall buildings.

AI Sleep Tracking: Provides you with a complete analysis of your sleep quality and suggests ways to wake up with more energy.

Battery: Forget the Charger

8 Days Battery Life: With typical use, the Watch S4 lasts for 8 days.

Fast Charging: 5 minutes of charging is enough for 2 full days of use.

Smart Functions that Make Life Easier

Bluetooth Calling: Crystal clear call sound thanks to the upgraded microphone with noise cancellation.

NFC Payments: Pay for your coffee simply by bringing your watch close to the POS (via Xiaomi Pay).

Gesture Control: You can perform certain functions (such as rejecting a call) just by moving your wrist.

Technical Specifications

• Colour: White
• Release Date: 2025
• Screen Size: 1.32 "
• Screen Type: AMOLED
• Compatible Operating System: Android, iOS
• Touch Screen: Yes
• Connection: Bluetooth, NFC
• Strap: Silicone
• Case material: Aluminum
• Features: Vibration, Speaker, Microphone
• Features & Functions: Email, SMS, Caller ID, Application / Calls Notification
• Use: Misc Sports / Gym, Swimming, Hiking, Cycling, Running
• Sensors: GPS, Barometer, Pedometer, Gyroscope, Accelerometer, Heart Rate, Oximeter, Sleep Monitoring, Compass
• Protection: Splash Resistant, Dust Resistant
• ATM Rating: 5 ATM
• Waterproof: Pool Swimming
• MIL-STD-810: No
• Battery Life: 8 days
• Case Size: 41 mm
• Weight: 32 gr
• AI Voice Assistant: No
• AI Training Coach: –
• AI Health Insights: –

Technical Specifications

• Colour: White
• Release Date: 2025
• Screen Size: 1.32 "
• Screen Type: AMOLED
• Compatible Operating System: Android, iOS
• Touch Screen: Yes
• Connection: Bluetooth, NFC
• Strap: Silicone
• Case material: Aluminum
• Features: Vibration, Speaker, Microphone
• Features & Functions: Email, SMS, Caller ID, Application / Calls Notification
• Use: Misc Sports / Gym, Swimming, Hiking, Cycling, Running
• Sensors: GPS, Barometer, Pedometer, Gyroscope, Accelerometer, Heart Rate, Oximeter, Sleep Monitoring, Compass
• Protection: Splash Resistant, Dust Resistant
• ATM Rating: 5 ATM
• Waterproof: Pool Swimming
• MIL-STD-810: No
• Battery Life: 8 days
• Case Size: 41 mm
• Weight: 32 gr
• AI Voice Assistant: No
• AI Training Coach: –
• AI Health Insights: –

• The brightness of the Watch S4's display is significantly improved, reaching up to 1500 nits compared to the Watch S3's 600 nits, enhancing visibility in bright environments.
• The Watch S3 uses two level buttons for navigation, while the Watch S4 replaces one button with a rotating crown, offering a more intuitive and smoother scrolling experience through the menus.
• The Watch S4 is upgraded to Bluetooth 5.3 from the Watch S3's Bluetooth 5.2, providing more stable and efficient connections with lower battery consumption.
• Interchangeable Bezel (Bezel Design): This is its "magical" feature. You don’t just change the strap, but the entire bezel around the screen. As soon as you snap on a new bezel, the watch automatically recognizes it and changes the watch face to perfectly match your new style!
• 1.32" AMOLED Display with 1500 nits: The 2026 display is brighter than ever. The colors "pop" out of the crystal, and using it under the intense Greek sun is now a pleasure, not a challenge.
• HyperOS 2.0: Xiaomi’s new operating system makes the watch fly. The connection with your phone (especially if you have a Xiaomi) is instantaneous, and notifications now arrive more cleverly organized than ever before.
• 98.5% Accuracy in Heart Rate: With the new sensor, measurements approach the accuracy of medical chest bands.
• Dual-Band GNSS (5 Systems): For those who run in the city, GPS locks in seconds and doesn't lose your route among tall buildings.
• AI Sleep Tracking: Provides you with a complete analysis of your sleep quality and suggests ways to wake up with more energy.
• 8 Days Battery Life: With typical use, the Watch S4 lasts for 8 days.
• Fast Charging: 5 minutes of charging is enough for 2 full days of use.
• Bluetooth Calling: Crystal clear call sound thanks to the upgraded microphone with noise cancellation.
• NFC Payments: Pay for your coffee simply by bringing your watch close to the POS (via Xiaomi Pay).
• Gesture Control: You can perform certain functions (such as rejecting a call) just by moving your wrist.
• The brightness of the Watch S4's display is significantly improved, reaching up to 1500 nits compared to the Watch S3's 600 nits, enhancing visibility in bright environments.
• The Watch S3 uses two level buttons for navigation, while the Watch S4 replaces one button with a rotating crown, offering a more intuitive and smoother scrolling experience through the menus.
• The Watch S4 is upgraded to Bluetooth 5.3 from the Watch S3's Bluetooth 5.2, providing more stable and efficient connections with lower battery consumption.
• Interchangeable Bezel (Bezel Design): This is its "magical" feature. You don’t just change the strap, but the entire bezel around the screen. As soon as you snap on a new bezel, the watch automatically recognizes it and changes the watch face to perfectly match your new style!
• 1.32" AMOLED Display with 1500 nits: The 2026 display is brighter than ever. The colors "pop" out of the crystal, and using it under the intense Greek sun is now a pleasure, not a challenge.
• HyperOS 2.0: Xiaomi’s new operating system makes the watch fly. The connection with your phone (especially if you have a Xiaomi) is instantaneous, and notifications now arrive more cleverly organized than ever before.
• 98.5% Accuracy in Heart Rate: With the new sensor, measurements approach the accuracy of medical chest bands.
• Dual-Band GNSS (5 Systems): For those who run in the city, GPS locks in seconds and doesn't lose your route among tall buildings.
• AI Sleep Tracking: Provides you with a complete analysis of your sleep quality and suggests ways to wake up with more energy.
• 8 Days Battery Life: With typical use, the Watch S4 lasts for 8 days.
• Fast Charging: 5 minutes of charging is enough for 2 full days of use.
• Bluetooth Calling: Crystal clear call sound thanks to the upgraded microphone with noise cancellation.
• NFC Payments: Pay for your coffee simply by bringing your watch close to the POS (via Xiaomi Pay).
• Gesture Control: You can perform certain functions (such as rejecting a call) just by moving your wrist.