Xiaomi Smart Hub is available only when connected to Xiaomi smartphones that support Xiaomi HyperOS 2.
The data of battery life is based on typical usage mode, tested by Xiaomi Internal Labs. Actual results may vary.
This product and its features are not designed for medical purposes, and are not intended to predict, diagnose, prevent, or cure any disease.
Premium performance
Dazzling display
Outstanding clarity
Featuring a 1.43-inch AMOLED large display that delivers clear and smooth visuals, as well as an astounding HBM brightness of up to 1500nits.
326
PPI
60Hz
Refresh rate
1500nits
HBM brightness
2200nits
Peak brightness
Moisture-resistant touch control
New algorithm prevents accidental operations caused by water droplets.
Display refresh rate may vary across different interfaces. Please refer to the actual usage scenario.
The HBM brightness is the maximum brightness when the entire screen lights up. Peak brightness is the highest brightness achieved when only a specific part of the screen lights up.
Up to 15 days of battery life
A long battery life of 15 days* ensures more than 2 weeks of use, so there's no need to bring your watch charger for short-term trips.
5 minutes of fast charging delivers 2 days of usage
Charge your watch while showering or brushing your teeth.
Battery life data is based on typical usage mode and comes from Xiaomi Internal Labs. Actual results may vary.
Timeless design
Silver
Black
Rainbow
Rotating crown
New interactive experience
An upgraded rotating crown delivers a refined tactile experience. Rotate for quick access to widgets and message previews for improved reading efficiency.
Sleek design with exceptional craftsmanship
Exquisite aluminium alloy frame with a stainless steel-like high-gloss texture produced through a PVD process.
Simple and effective lug design
Classic design with minute markers
Interchangeable accessories
Trendy and fully customisable
Xiaomi Watch S4 draws inspiration from traditional watches and offers a variety of iconic, trendy interchangeable bezels crafted from quality materials showcasing distinct, creative styles.
Some watch faces in the image require a specific bezel and strap kit to activate and cannot be obtained from the Mi Fitness app.
Comes with a Silver, Black, or Rainbow bezel and strap kit as standard. Other bezel and strap kits must be purchased separately.
Dual-Tone Ceramic (Blue-gray)
The two-tone blue-gray ceramic bezel showcases a dual GMT zone design with an elegant and chic style.
*Click on the GMT small dial to enter the time zone selection mode. The GMT dial will indicate the second time zone's time.
Pine Green
The stainless-steel engraved bezel has clear markings and a dark and understated lustre.
The pine green leather strap emanates quiet sophistication and a bold, professional presence.
Midnight Carbon
Exceptional craftsmanship with a carbon bezel made of forged carbon mixed with copper, showcasing unique patterns.
Includes an exclusive compass on the watch face, allowing you to check your orientation anytime.
Festive Orange
Featuring a stainless-steel wood-grain laser-engraved watch face with subtle light and shadow for a cosy vibe.
Exclusive stress watch face allows you to monitor your emotional state throughout the day.
The all-day stress monitoring feature needs to be enabled before use. Different stress levels correspond with different expressions. Measurement accuracy may be affected by wearing status, skin type and environmental factors.
Liquid Silver
Exudes an artsy feel showcased by a unique liquid flow effect. Also featuring a skin-friendly fluororubber strap with simple yet detailed ripple patterns.
Health and fitness
Health at a glance
One tap for better wellness
One-tap health insights
Monitors heart rate, stress, blood oxygen, and sleep. A micro-physical examination report is generated in around 60 seconds.
Breathing exercise
Includes new breathing exercises, including relax, concentrate, take a nap, and sleep soundly.
High-precision sensing module
24/7 health protection
The combination of a high-precision heart rate monitoring module and self-developed heart rate algorithm improves the accuracy of heart rate monitoring on the watch to 98%
Data comes from Xiaomi Internal Labs. The average accuracy is up to 98% in scenarios such as sitting, office reading, treadmill running, and outdoor running, walking and cycling. In real-world usage, accuracy may vary due to individual differences, usage habits and environmental factors.
All-day blood oxygen saturation monitoring
All-day stress monitoring
All-day advanced sleep monitoring
The features of all-day blood oxygen saturation monitoring, all-day stress monitoring, and all-day advanced sleep monitoring need to be manually turned on. For more details about the monitoring frequency and principle, please refer to the description in the app.
150+ sports modes
Ideal for all sorts of activities
Personal running coach on your wrist
Perfect for your training
L1+L5 dual-frequency GNSS of five satellite positioning systems
The independent dual-frequency GNSS chip offers precise positioning via five major satellite systems to quickly and accurately record outdoor activities.
On-wrist running courses
From beginners, fat loss and weight loss, to improving cardiopulmonary function and endurance, there are professional courses and scientific training to help you continue to advance.
Running form recognition
Automatically identify key running posture metrics like vertical ratio, vertical amplitude, and ground contact time to offer professional tips for better workouts.
Professional skiing mode
Professional skiing mode records your distance, time, average speed of each glide and turn, and more in the Mi Fitness app.
Fall detection for safety
Now supports fall detection while skiing. If no response is detected within 60 seconds, the system will automatically call your emergency contact*.
Fall detection while skiing and emergency calls must be enabled and set up on the safety settings page in any skiing mode. The emergency call feature requires the watch to be connected to the Mi Fitness app. The emergency contact information needs to be set in advance.
Health data at your fingertips
With Xiaomi's independently developed algorithm and Mi Fitness app, Xiaomi Watch S4 can monitor your health with greater accuracy. Now supporting Health Connect and popular workout apps like Strava and Suunto, it brings you even more flexibility and convenience.
A smart, connected lifestyle
Xiaomi Smart Hub
Seamless interconnectivity
Remote photo-taking, find my phone, earphone settings*, and more. It can also control Xiaomi Home devices*, making smart wearables and home life more intelligently interconnected.
To use the Xiaomi Smart Hub, the watch needs to be connected to a Xiaomi smartphone or pad supporting the latest version of Xiaomi HyperOS 2 and running the latest version of the Mi Fitness app and version 10.4 or above of the Xiaomi Home app.
Xiaomi Home devices can be controlled only when connected to the Xiaomi 15 Ultra via OTA available from March 2025, and to the Xiaomi 15 via OTA available from April 2025. More available models will be updated later on mi.com/global.
New quick gestures
All it takes is a snap of your fingers
Customisable gestures control the watch's native functions, including rejecting and ignoring calls or notifications, taking photos remotely, opening the weather app, and more.
To activate gesture controls, the user must remain still with the forearm parallel to the chest, ensuring the screen is active and displayed on the dial or function page.
Gesture control features are limited depending on factors such as device model, system and software version. Please refer to the information below for more details.
More Information
Select From Category
Wearables
Device Type
Smart Watches
Brand
Xiaomi
Model
Xiaomi Watch S4 - Rainbow
Display Size
1.4 inches
Battery Time
Up to 15 Days
Color
Rainbow
Features
Dimensions 47.3mm x 47.3mm x 12.0mm Height, width and thickness dimensions exclude the strap and protrusions 44.5g approx. (without inbox strap) Frame Aluminum alloy frame Strap Rainbow: fluororubber strap Adjustable strap length: 140-210mm approx. Sensors Heart rate sensor (with blood oxygen sensor) | Accelerometer | Gyroscope | Ambient light sensor | Electronic compass | Barometer sensor | Hall sensor Satellite positioning systems GPS | Galileo | Glonass | BeiDou | QZSS Battery Typical usage time: 15 days Capacity: 486mAh Display Resolution: 466 x 466 pixels，PPI 326 1.43-inch AMOLED display 60Hz refresh rate Display refresh rate may vary across different interfaces. Please refer to the actual usage scenario. Brightness: HBM 1500 nits The HBM brightness is the maximum brightness when the entire screen lights up. Built-in GNSS: Supported Water resistance rating: 5ATM The 5ATM water resistance rating (equivalent to a depth of 50 meters) means it can be worn in swimming pools, while swimming near the shore, and during other shallow water activities. It is not suitable for wearing in hot showers, saunas, or while diving. Make sure to avoid direct impacts from swift currents during water sports. Water resistance is not permanent and may deteriorate over time. Speaker: Supported Microphone: 2 mics NFC: Supported NFC availability may vary by region. Bluetooth calling: Supported The watch must be kept connected to the smartphone's Bluetooth. Voice calls from third-party apps are not currently supported. Wireless connectivity: Bluetooth® 5.3 Operating system: Xiaomi HyperOS 2 Compatibility: Supports smartphones with Android 8.0 and above, or iOS 14.0 and above. Charging port: 2-Pin magnetic charging dock
