| key specs |
| Display Size | 36mm | 36mm |
| Compatible OS | Android 8.0 or above, iOS 12.0 or above | Android, iOS |
| Dial Shape | Round | Round |
| Display Type | AMOLED | AMOLED |
| Ideal For | Unisex | - |
| Strap Colour | - | Classic Black, Classic Blue, Classic Brown, Jet Black and Metal Blue |
| Strap Material | - | Silicone |
| general |
| Brand | Xiaomi | Noise |
| Model | Watch S4 15th Anniversary Edition | Fit Twist Pro |
| Release date | May 23, 2025 | July 7, 2023 |
| Model Name | Xiaomi Watch S4 15th Anniversary Edition | NoiseFit Twist Pro |
| Dial Colour | Black | Black |
| Dial Shape | Round | Round |
| Size | Regular | Regular |
| Touchscreen | 1.43 | - |
| Interchangeable Strap | Yes | - |
| Water Resistant | 5 ATM | IP68 |
| Usage | Regular | - |
| Ideal For | Unisex | - |
| Strap Colour | - | Classic Black, Classic Blue, Classic Brown, Jet Black and Metal Blue |
| Strap Material | - | Silicone |
| dimensions |
| Width | 47.3 | 3.9cm |
| Height | 47.3 | 1.2cm |
| Thickness | 12 | 4.7cm |
| Weight (g) | 44.50 | 45.00 |
| product details |
| Sensor | Heart Rate Monitor, Stress, Sleep | Heart rate sensor, accelerometer, SpO2 sensor |
| Compatible Device | Android and iOS | Android, iOS |
| Battery Type | 486mAh | 300mAh |
| Notification | - | Yes |
| Battery Life | - | 7 days |
| Charge Time | - | 2 hours |
| Stand By Time | - | 25 days |
| Rechargeable Battery | - | Yes |
| connectivity features |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Wi-Fi | Yes | - |
| GPS | Yes | - |
| Other Connectivity Features | NFC, Galileo, Glonass, Beidou, QZSS | - |
| Call Function | - | Yes |
| platform and storage features |
| Operating System | HyperOS 2 | - |
| Compatible Operating System | Android 8.0 or above, iOS 12.0 or above | Android, iOS |
| camera and display features |
| Display Resolution | 466 x 466 | 240x240 |
| Display Size | 36mm | 36mm |
| Display Type | AMOLED | AMOLED |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Calorie Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Language | English | - |
| Compass | - | Yes |
| Calendar | - | Yes |
| Number of Buttons | - | 2 |
| Other Fitness Features | - | Sleep monitor, stress monitor, Female cycle tracker, Breathing practice |
| Other Watch Functions | - | Alarm Clock, Voice Assistance, In Built Mic & Speaker, Find My Device, Camera Shutter, World Clock, Remote Music Control, Wrist Awake |