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Xiaomi S4 smartwatch

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Features of Xiaomi S4

Product description of Xiaomi S4 smartwatch

Description summary

Experience the Xiaomi Watch S4, where style meets innovation. Its vibrant 1.43” AMOLED screen shines bright, housed in a sleek rainbow aluminum body. Personalize your look with the unique interchangeable bezel 2.0 and navigate effortlessly with the rotating crown. Track your fitness with advanced sports modes, including running posture analysis and ski fall detection. With optimized heart rate monitoring, clear Bluetooth calls, 5 ATM water resistance, and up to 15 days of battery, it’s the ultimate smart companion for your active lifestyle

This device is unlocked from any phone company (factory unlocked).

Xiaomi Watch S4 black with 1.43” AMOLED display, advanced specific sports modes, and interchangeable bezel 2.0.

AMOLED screen - 1.43´´ circular design - 466x466 resolution (326 ppi) - Bluetooth 5.3 - Mi Fitness app - Xiaomi HyperOS 2.0 - Battery life of up to 15 days (typical use) - Interchangeable silicone strap - 5 ATM water resistance - Black.

The Watch S4 is a Xiaomi smartwatch with health tracking through multiple advanced specific sports modes and its optimized algorithm for heart rate monitoring.

This is presented framed in a classic and elegant black design with an aluminum body, also sporting a water resistance of 5 ATM.

It comes accompanied by an interchangeable bezel and a silicone strap, and is crowned by a 1.43-inch round AMOLED screen.

Elegant design with trimmed corners and aluminum frame.

The watch dazzles with an elegant and premium design, boasting a frame made of aluminum alloy.

Its trimmed corners not only improve its own appearance, but also manage to simulate a thinner and narrower look.

Improved interchangeable bezel and exclusive watch faces.

The quick-installation interchangeable bezel 2.0 brings with it certain improvements in the structure and materials compared to its predecessor, the Xiaomi Watch S3.

In addition, the smartwatch allows you to activate watch faces with specific functions, adapting to your preferences with a touch of personalization.

Rotating crown for navigation and quick access to Widgets.

Likewise, the Xiaomi S4 smartwatch incorporates a rotating crown, which facilitates both navigation through the screen and quick access to your favorite Widgets.

When combined with the advanced HyperOS 2.0 system, the interaction is even smoother and the operations are faster.

1.43´´ AMOLED screen with peak brightness of 2200 nits.

And if we look at the front of the watch, we can inspect its latest generation 1.43-inch AMOLED screen.

This exerts a maximum brightness of 2200 nits, thus guaranteeing a clear vision even outdoors.

Dual microphone with noise reduction for Bluetooth calls. To all this we must add two microphones with noise reduction system, which significantly improves the quality of Bluetooth calls compared to the previous model, making them clearer in noisy environments.

Improved algorithm for heart rate monitoring.

This smartwatch incorporates advanced health care functions, including its own algorithm that improves the accuracy in heart rate monitoring.

With just one click, it performs a physical exam of different parameters, and also detects sleep rhythm disorders and offers respiratory training guides.

Advanced professional sports mode.

To top it off, this Xiaomi S4 watch now has a running posture recognition function, thus supporting a more detailed and effective analysis of your workouts.

It also includes fall detection in ski mode, providing additional safety during high-risk activities.

Technical specifications Xiaomi Watch S4 Black:.

General parameters.

Brand: Xiaomi.

Product: Smartwatch.

Model: Watch S4.

Screen.

Size: 1.43”.

Type: AMOLED.

Resolution: 466x466, 326 ppi.

Maximum brightness: 2200 nits.

Connectivity.

Connectivity: Bluetooth 5.3.

Application: Mi Fitness.

Sensors.

Health:.

Optical heart rate sensor.

SpO2 sensor.

Movement and environmental:.

Accelerometer.

Gyroscope.

Ambient light sensor.

Electronic compass.

Barometer.

Hall sensor.

Battery.

Capacity: 486 mAh.

Autonomy (typical use): 15 days.

Design.

Body: Aluminum alloy.

Water resistance rating: 5 ATM.

Dimensions: 47x47 x 12 mm.

Weight: 44.5 g (without strap).

Color: Black.

Package content.

1 x Xiaomi Watch S4 Black.

1 x Charging cable.

1 x User manual.

Technical specifications of Xiaomi S4

  • Accelerometer

    Yes

  • Heart Rate

    Yes

  • Dimensions

    47 X 47 X 12 Mm

  • Weight

    44.5 G (No strap)

  • Resolution

    466 X 466, 326 Ppi

  • Water Resistance Rating

    5 Atm

  • Color

    Silver

  • Age

    Adult

  • Features

    Wrist heart rate

  • Product Aspect

    New

Features of Xiaomi S4

Color Silver

Color

Silver

Age Adult

Age

Adult

Features Wrist heart rate

Features

Wrist heart rate

Product Aspect New

Product Aspect

New

Key differentiators

Features a vibrant 1.43-inch AMOLED display with a 466 x 466 resolution.

Includes advanced health sensors for heart rate and SpO2 monitoring.

Offers an extended battery life of up to 15 days with typical use.

Provides 5 ATM water resistance, suitable for various activities.

Supports clear Bluetooth calls with a dual microphone noise reduction system.

Technology in Xiaomi S4 smartwatch

Energy rating

Warnings

/ 5

1 Reviews

What our customers are saying about Xiaomi S4 smartwatch

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Answer the question

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The question has already been answered, thank you very much for trying to help another customer. We will count on you for future questions.

Include AI Generated questions and answers

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

What are the main features of the Xiaomi Watch S4?

Answer of Generated by AI and verified

It offers up to 15 days of battery life, 5 ATM water resistance, and advanced health monitoring including a heart rate monitor and SpO2 sensor. It also supports Bluetooth calls and has an interchangeable bezel for personalization.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

Is the Xiaomi Watch S4 suitable for swimming?

Answer of Generated by AI and verified

Yes, the Xiaomi Watch S4 has a water resistance rating of 5 ATM, which makes it suitable for swimming in a pool or the ocean. It is not recommended for high-speed water sports or deep-water diving.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

Can I make and receive phone calls on the Xiaomi Watch S4?

Answer of Generated by AI and verified

Yes, the Xiaomi Watch S4 supports Bluetooth calls. You can handle calls directly from the watch, which is equipped with a dual microphone for noise reduction to ensure clear conversations.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

Is the Xiaomi Watch S4 worth buying for fitness users?

Answer of Generated by AI and verified

The Xiaomi Watch S4 offers advanced specific sports modes and optimized heart rate monitoring, making it a great choice for fitness users looking for a reliable smartwatch.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

What is the battery life of the Xiaomi Watch S4?

Answer of Generated by AI and verified

The Xiaomi Watch S4 offers a battery life of up to 15 days with typical use on a single charge.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

What type of display does the Xiaomi Watch S4 have?

Answer of Generated by AI and verified

The screen resolution is 466 x 466 pixels.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

What materials are used for the Xiaomi Watch S4?

Answer of Generated by AI and verified

The Xiaomi Watch S4 features a durable and elegant aluminum alloy case and bezel. It comes with a comfortable silicone strap.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

Does the Xiaomi Watch S4 have a built-in GPS?

Answer of Generated by AI and verified

No, the Xiaomi Watch S4 does not have a built-in GPS function.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

What is the water resistance rating of the Xiaomi Watch S4?

Answer of Generated by AI and verified

The Xiaomi Watch S4 has a water resistance rating of 5 ATM, suitable for swimming and other water-related activities.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

What fitness and health features does the Xiaomi Watch S4 offer?

Answer of Generated by AI and verified

The Xiaomi Watch S4 includes an optimized heart rate monitor, an SpO2 sensor for blood oxygen monitoring, and fall detection. It also features advanced specific sports modes, including running posture analysis and ski fall detection, to support an active lifestyle.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

Can I customize the look of the Xiaomi Watch S4?

Answer of Generated by AI and verified

Yes, you can personalize the Xiaomi Watch S4. It features an interchangeable bezel (version 2.0) and supports exclusive watch faces that can be activated to match your style and preferences.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Xiaomi S4 smartwatch

What operating system does the Xiaomi Watch S4 use?

Answer of Generated by AI and verified

The Xiaomi Watch S4 runs on the Xiaomi HyperOS 2.0 operating system.

* Generated by AI based on customer and product data

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Frequently bought together
Best sellers

Use cases

Comprehensive Health and Fitness Monitoring 90% Fit

With its integrated heart rate monitor, SpO2 sensor, and multiple advanced sports modes, this watch is a great all-rounder for users committed to tracking their daily activity and overall wellness. It provides a solid performance upgrade for those wanting detailed insights into their health.

Heart rate monitor,SpO2 sensor,Advanced specific sports modes,5 ATM water resistance

Daily Wear and Smartphone Integration 90% Fit

Featuring a bright AMOLED touchscreen, Bluetooth 5.3 connectivity, and smart notifications, this watch seamlessly integrates with your daily life. The ability to handle Bluetooth calls directly from the watch makes it a versatile companion for staying connected on the go.

AMOLED display,Bluetooth 5.3,Smart notifications,Bluetooth call handling

Outdoor and Adventure Sports 75% Fit

Equipped with a barometer, electronic compass, and 5 ATM water resistance, this watch is a reliable upgrade for tracking outdoor activities like hiking or swimming. The fall detection feature adds a layer of safety for more adventurous pursuits.

Barometer,Digital compass,5 ATM water resistance,Fall detection

Extended Use and Travel 85% Fit

With a battery life of up to 15 days on typical use, this watch is ideal for users who travel frequently or prefer not to charge their device every night. The long battery life ensures continuous tracking and connectivity without interruption.

Up to 15-day battery life,Rechargeable lithium battery,2-hour charging time

Specialized Sports Training 80% Fit

This watch offers advanced, specific sports modes that go beyond basic tracking, including running posture analysis and ski fall detection. It's a solid performance tool for athletes looking to refine their technique and monitor safety in specific disciplines.

Advanced specific sports modes,Running posture analysis,Ski fall detection,Gyroscope and accelerometer

Best for

Best for Everyday Health Monitoring

With a long 15-day battery life, smart notifications, and Bluetooth call handling, this watch seamlessly integrates into your daily routine while providing key health insights.

Ideal for Users

The sleek aluminum alloy case, vibrant AMOLED display, and interchangeable bezel offer a sophisticated look that complements any style.

A Solid Upgrade for Regular Exercisers

Featuring advanced sports modes, accurate heart rate and SpO2 monitoring, and 5 ATM water resistance, this watch is a reliable partner for tracking and enhancing your workouts.

Enhanced Workout Experience: 80%

Great for Proactive Health Management

This watch empowers you to stay on top of your well-being with its comprehensive suite of sensors, including a heart rate monitor, SpO2 sensor, and fall detection for added security.

Benefits

FunctionalKeep track of key health metrics throughout the day

Monitor your well-being with built-in sensors that track important health data. The watch includes a heart rate monitor and an SpO2 sensor to provide valuable insights into your body's condition, supporting a more health-conscious lifestyle.

FunctionalHandle calls and notifications directly from your wrist

Seamlessly manage communications without reaching for your phone. This watch supports clear Bluetooth calls, thanks to its dual microphone with noise reduction, and displays smart notifications to keep you informed.

FunctionalTrack a wide range of activities with confidence

Whether you're running, skiing, or just going about your day, this watch is ready to track your performance. It features advanced specific sports modes and is rated for 5 ATM water resistance, making it a versatile partner for your active life.

Ideal buyer profiles

Ideal Buyer

This user wants a reliable, easy-to-use smartwatch for everyday life. They value convenience, long battery life, and core smart features like notifications and call handling, without needing complex, professional-grade athletic tracking.

With up to 15 days of battery life, Bluetooth call handling, and smart notifications, the Xiaomi Watch S4 delivers the core features they need. The bright AMOLED display and comfortable silicone strap make it an excellent daily companion for staying connected and monitoring general wellness.

The User

This individual sees a smartwatch as both a tech gadget and a style accessory. They look for a sleek design, premium materials, a high-quality display, and the ability to customize the watch's appearance to match their personal style.

The Xiaomi Watch S4 meets their needs with its aluminum alloy case, rotating crown, and interchangeable bezel. The crisp, bright 1.43-inch AMOLED screen provides a premium visual experience, allowing them to showcase their style while staying connected.

The Individual

Focused on maintaining a healthy lifestyle, this user prioritizes comprehensive health tracking features. They want detailed insights into their heart rate, sleep patterns, and blood oxygen levels to monitor their overall well-being and make informed health decisions.

This watch is an ideal partner for health monitoring, offering a suite of sensors including a heart rate monitor, SpO2 sensor, and accelerometer for sleep tracking. Features like fall detection provide added peace of mind, making it a robust tool for keeping a close eye on personal health metrics.

Competitive features

When evaluating the Xiaomi S4 Smartwatch against other models like the Xiaomi Watch S4 Plata, Noise Endeavour Pro, and Xiaomi Watch S5, it's important to focus on its specific blend of features. While direct attribute-for-attribute data is limited, we can analyze the S4 based on its provided specifications to understand its position in the market.

Where it excels

The Xiaomi S4 Smartwatch stands out with its combination of a vibrant 1.43” AMOLED display and a long battery life of up to 15 days, offering both a high-quality user interface and extended use between charges. It caters well to active users with specialized features not always found in competitors, such as running posture analysis and ski fall detection, alongside 5 ATM water resistance for swimming. Personalization is a key strength, featuring an interchangeable bezel and a sleek rainbow aluminum body, allowing users to tailor the watch's appearance to their style.

Consider alternatives if...

While the Xiaomi S4 offers a robust set of features, buyers seeking models with specific, confirmed attributes like GPS functionality explicitly listed in a comparison matrix might want to evaluate alternatives like the Noise Endeavour Pro Gps Smartwatch. The provided data for the S4 does not explicitly confirm GPS, which could be a deciding factor for serious runners or cyclists. Shoppers prioritizing brand diversity or a different design philosophy might look towards non-Xiaomi models like the Kospet T4c or the uniquely styled Mi Ciga Design Z Series, which offer different aesthetics and feature sets.

Verdict

The Xiaomi S4 Smartwatch presents a compelling package for users seeking a stylish, feature-rich, and long-lasting wearable. Its bright AMOLED screen, advanced and specialized sports modes, and impressive battery life make it a strong contender for both everyday users and fitness users. It effectively balances aesthetics with practical health and activity tracking, making it a versatile smart companion.

Specs comparison

Battery Life15 days20 days15 days-15 days
Water Resistance5 Atm5 atm5 Atm5 Atm5ATM
Charging Time2-2--
GpsNoYesYes-Yes
TouchscreenYesYesYesYesYes
Barometric AltimeterYes-Yes-Yes
Battery Typerechargeable lithiumrechargeable lithiumrechargeable lithiumrechargeable lithiumLithium-Ion
Screen Size Inches1.43 1.2 - 1.81.97 inches1.43 1.2 - 1.81.43 1.2 - 1.81.4 1.2 - 1.8
Battery Life Days15 hours20 hours15 hours14 hours15 hours
Sports Modes Countmultiple advanced specific sports modes15010multiple150
Spo2 SensorYesYesYesYesYes
Digital CompassYesYesYes-Yes
Resolution466 x 466390 X 450 P466x466High-Definition466x466 pixels
AccelerometerYesYesYesYesYes
Screen Resolution466 x 466390 x 450466 x 466-466x466 pixels
Smart NotificationsYesYesYesYesYes
Bezel Materialaluminumaluminum alloyaluminum316L Stainless SteelStainless Steel
Case Materialaluminum alloyaluminum alloyAluminum alloy316L Stainless SteelAluminum
Call HandlingBluetooth calls with dual microphone noise reductionbluetooth calls with built-in microphone and speaker--Yes

Specs vs competitors

Battery Life15 days15 days10 days14 days20 days25 days
Water Resistance5 Atm5 ATM5 Atm5 ATM5 Atm5 ATM
Charging Time221.5 hours--2 hours
GpsNoYesYesYesYesYes
TouchscreenYes-Yes-Yes-
Barometric AltimeterYesYesYes-YesYes
Battery Typerechargeable lithiumdual-core batteryLithium-Ionrechargeable lithiumrechargeable lithiumrechargeable lithium
Screen Size Inches1.43 1.2 - 1.81.32 inches1.82 inches1.43 inches1.43 1.2 - 1.81.5 inches
Battery Life Days15 hours15 hours10 hours14 days20 hours25 days
Sports Modes Countmultiple advanced specific sports modes150100150105170
Spo2 SensorYesYesYesYesYesYes
Digital CompassYesYesNo-NoYes
Resolution466 x 466466 x 466480x408466x466 px466 X 466 Px, 326 Ppi480x480
AccelerometerYesYesYesYesYesYes
Screen Resolution466 x 466466 x 466480x408466x466 px466 x 466480x480
Smart NotificationsYesYesYesYesYesYes
Bezel Materialaluminum--MetalMetal-
Case Materialaluminum alloymetalAluminumPA+GFStainless Steel 316L + Pa+GfPolymer case, aluminum alloy frame
Call HandlingBluetooth calls with dual microphone noise reductionhands-free Bluetooth callingBluetooth callingBluetooth callingBluetooth calling functionality with answer, reject, mute-
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