Galaxy Watch4 Bluetooth (40mm)

Galaxy Watch4

Four Galaxy Watch4 devices are grouped together, with each watch prominently showing different watch face styles to tell the time. Each watch is in a different color, from black, pink gold, green, to silver.

The watch that knows you best

A green Galaxy Watch4 is displayed with a band that is spread wide. The watch face shows one of the designs that displays the time in a green color.

Most of us want to know more about ourselves, so we can be the best version of ourselves. That's why we engineered the all-new Galaxy Watch4 to be the companion to your journey towards a healthier you. 1

Design Your Own

GO TO GALAXY WATCH
DESIGN STUDIO

FITNESS

Fitness
within
arm’s
reach

A woman is smiling and holding a frisbee while wearing a silver Galaxy Watch4 on her wrist.

BODY COMPOSITION

Don’t just listen
to your body.
Know it

Track your fitness progress with our first smartwatch that conveniently measures body composition. Get to know your body fat percentage, skeletal muscle, body water and more to achieve your goals. The Samsung BioActive Sensor and our fastest chip brings the biggest innovation to Galaxy Watch yet. 2, 3, 4, 5, 6, 7

A woman is looking at the mirror and flexing her muscles while wearing a Galaxy Watch4 device and holding a Galaxy Z Flip3 5G in her right hand.
The front of the Galaxy Watch4's watch face is shown with the Body Composition feature on, waiting to measure.

Get a BIA measurement using just two fingers in 15 seconds. Anytime, anywhere.

The underneath of a Galaxy Watch4 device is shown and the sensor is being highlighted.

The new Samsung BioActive Sensor captures your body composition in real time to inform you as you manage your health goals.

Measurement results of different metrics from weight, BMI, skeletal muscle, fat mass, body water, to BMR.

GROUP CHALLENGE

Your workout buddies have
your back

Following the text message, there are two emotes; a gush of wind and a set of eyes glancing left.

See you at the finish line, David!

12:45 PM

The front of a Galaxy Watch4 with a green band is shown, and its watch face displays "3rd place" in a walking Group Challenge with friends. Around the watch are diverse people cropped in a circle. There are text bubbles on the top left and bottom right, each pointing to its speaker.

Two exclamation point emotes are used before and after the words "Look out".

Look out Isabella is catching up…

12:46 PM

Enjoy every step you take with your friends and family with the Galaxy Watch4. Track your steps and compete with friends in a fun competition through a live message board. Challenges come with commemorative badges and a point system to make exercise fun, motivating and socially rewarding.

DAILY ACTIVITY & FITNESS TRACKING

Name a workout.
It can track it

Icons of different exercises can be seen and the swimming icon is highlighted. A woman is swimming in a swimming pool while wearing a Galaxy Watch4 device.
Two women and one man are riding bicycles together on a sunny day. They are similing and enjoying the ride while wearing Galaxy Watch4 devices.
A man is stretching his left arm and is getting ready for a workout. He is wearing a black Galaxy Watch4 device on his right wrist.

Track your activities and fitness scores on your watch and phone. Count steps, check calories, and stay on the grid with GPS. Galaxy Watch4 detects physical activity to track your routines and supports more than 90 exercises for a more accurate report of your workouts. 8

HEALTH

A watch that's watching out for you

A Galaxy Watch4 device in pink gold color attached with a pink band is shown. On the watch face, the menu for Blood Pressure and ECG measurement features are displayed.

BLOOD PRESSURE & ECG

All the data your heart desires

Meet the Samsung BioActive Sensor that measures ECG and blood pressure in real time. After initial calibration, the sensors quickly check your blood pressure. You can also check abnormal heart rate and rhythm through ECG and send data straight to your phone to be easily shared.

The underneath of the Galaxy Watch4 device's sensor that measures Blood Pressure is highlighted, followed by the sensor measuring ECG being highlighted.

Blood Pressure Measure Blood Pressure using an Optical Heart Rate Sensor known as the PPG Sensor.

ECG Measure ECG using an Electrical Heart Sensor.

The front watch face of the Galaxy Watch4 device is measuring blood pressure. Its display changes from the blood pressure measuring feature to the ECG measuring feature.

BLOOD OXYGEN

Measure blood
oxygen levels
from your wrist

Built-in blood oxygen measurement on Galaxy Watch4 lets you check the amounts of oxygen in your bloodstream at any time. Oxygen saturation is directly linked to physical performance, so monitoring your blood oxygen can help you maintain your health. 17, 18

Black Galaxy Watch4 displays oxygen saturation and BPM measurements.

ADVANCED SLEEP

The most holistic sleep analysis on Galaxy watch

A silver Galaxy Watch4 device is shown with a silver band tied round and its watch face displaying the sleep tracking feature.

The sleep tracker detects and holistically analyzes your sleep stages while you rest. Plus, get advanced insights from the National Sleep Foundation for better sleep quality and duration. 9, 10, 11, 12, 13, 14

DESIGN

Design comes full circle

Two Galaxy Watch4 devices are shown, a pink gold color on the left and a silver color on the lower right. Each has a watch face that is showing different colored designs to tell time.

DESIGN

Sleek, Seamless, Iconic

Galaxy Watch4 features a simple design with a streamlined Armor Aluminum metal frame. It offers high-end looks and functionality for your workouts and day-to-day tasks.

Choose from a selection of bands, including the Hybrid Leather Band and the Sport Band, to fashion your own band style. Treat your wrist with high-quality materials, comfort fit, and sweat-resistant surfaces.

There are three Galaxy Watch4 devices. The middle is in a green color and is showing its front watch face that has the number eight displayed. On th left is a silver Galaxy Watch4 showing the button side. On the right is a pink gold Galaxy Watch4 showing the opposite side.
A green Galaxy Watch4 device is showing the time on its watch face in a green and white outlined design along with a green running icon.
The sideways view of different Galaxy Watch4 devices are placed next to each other, forming a pattern. Various body and band colors are shown, from olive green, mustard, navy, pink, red and silver.
GO TO GALAXY WATCH4 CLASSIC

Galaxy Watch Design Studio

Time to find your personal style.

Five Galaxy Watch4 devices are placed side-by-side to show different colored watch bodies and bands. The watch bodies vary in color from pink gold, silver, and black, and are mixed with different colored bands.
GO TO GALAXY WATCH
DESIGN STUDIO

WATCH FACE

A new day.
A new watch face

A Galaxy Watch4 device and its various watch face styles can be seen.

Choose between analog or digital watch faces with a variety of backgrounds, fonts, and colors to match your tastes, the weather, or occasion. Spice up your character watch faces with AR Emojis to express your style, while animated graphics show what you're up to, like running or listening to music.

NEW OPERATING SYSTEM

It’s a real
team player

The sideways view of a green Galaxy Watch4 device is displayed, and various app icons can be seen.

The first smartwatch with Wear OS Powered by Samsung, Galaxy Watch4 puts seamless access to your favorite apps on your wrist. You'll get a rich app selection from music streaming apps to anything in the massive library of health and fitness apps. 15

COMPATIBILITY

Plays well with others

The Galaxy Watch4 comes with Wear OS Powered by Samsung, giving you seamless connection with Samsung Galaxy devices. Control ANC on Galaxy Buds2 or enable apps on your phone straight from your watch. Additional features like the compass makes the Galaxy Watch4 even more resourceful. 16

The Galaxy Watch4 Classic has a black color body and a black band.
Galaxy Watch4 Classic
The Galaxy Buds2 earbuds are shown in olive color.
Galaxy Buds2
The Galaxy Z Flip3 5G is shown half folded.
Galaxy Z Flip3 5G
The Galaxy Z Fold3 5G is also shown half folded.
Galaxy Z Fold3 5G

Life opens up
with Galaxy

EXPLORE MORE
C C
  1. Availability of colors, sizes, models, and bands may vary by country or region.

    * UI subject to change.

    * Available features and apps may vary by region, connected device, OS, or carrier.

    * All images on this page are simulated for illustrative purposes.

  2. DO NOT measure your body composition if you have an implanted pacemaker or other implanted medical devices.
  3. DO NOT measure your body composition if you are pregnant.
  4. Measurement results may not be accurate if you are under 20 years old.
  5. Intended for general wellness and fitness purposes only. Not intended for use in detection, diagnosis, treatment of any medical condition or disease. The measurements are for your personal reference only. Please consult a medical professional for advice.
  6. Availability of BIA may vary by country or region.
  7. All features and UI are subject to change.
  8. Galaxy Watch4 is rated as IP68. Based on test conditions for submersion in up to 1.5 metres of freshwater for up to 30 minutes.
  9. The Advanced Sleep feature is for fitness and wellness purposes only and not intended for use in detection, diagnosis, treatment of any medical condition or disease.
  10. The measurements are for your personal reference only. Please consult a medical professional for advice.

    - Availability may vary by country or region.

  11. The Galaxy Watch4 must be paired with a smartphone to use the sleep management function.
  12. For best results in detecting and recording snoring, place your smartphone on a stable surface near your head with the bottom of the smartphone pointed to your head.
  13. The default setting for snoring detection is off. Users can turn the setting on with their smartphone at anytime using the Samsung Health App 6.18 version or above.
  14. Advanced insights from the National Sleep Foundation is only available on a smartphone paired with the Galaxy Watch4.
  15. Available apps may vary by country or region.
  16. Buds Controller is compatible with Galaxy Buds+, Galaxy Watch4, and their respective following models.
  17. Availability may vary by country or region.
  18. Blood oxygen is for fitness and wellness purposes only and not intended for use in detection, diagnosis, treatment of any medical condition or disease. The measurements are for your personal reference only. Please consult a qualified medical healthcare professional for advice.
  • A woman is looking at the mirror and flexing her muscles while wearing a Galaxy Watch4 device and holding a Galaxy Z Flip3 5G in her right hand.
    Body composition measuring
  • A swimming icon is highlighted and a woman is swimming in a pool while wearing a Galaxy Watch4 device. Two women and one man are enjoying a bicycle ride on a sunny day while wearing Galaxy Watch4 devices. A man is getting ready for a workout while wearing a black Galaxy Watch4 device on his wrist.
    Daily Activity & Fitness tracking
  • There are three Galaxy Watch4 devices. The middle is in a green color and is showing its front watch face that has the number eight displayed. On th left is a silver Galaxy Watch4 showing the button side. On the right is a pink gold Galaxy Watch4 showing the opposite side.
    Design : Sleek and Iconic

Specifications

  • Size (Main Display) 1.2" (30.4mm)
  • Body Weight (g) 25.9 g
  • Bluetooth Version Bluetooth v5.0
  • Sensors Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor, Optical Heart Rate Sensor, Electrical heart sensor, Bioelectrical Impedance Analysis Sensor
  • Storage (GB) 16
  • CPU Speed 1.18 GHz
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Support

Find answers the question you have about the product

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User manual & Downloads
  • User Manual (Android Wear OS 4.0)
    ARABIC
    Download
  • User Manual (Android Wear OS 4.0)
    PORTUGUESE(European)
    Download
  • User Manual (Android Wear OS 4.0)
    ENGLISH
    Download
  • User Manual (Android Wear OS 4.0)
    FRENCH
    Download
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FAQ

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* Reference to thickness does not include the Optical heart rate sensor or Electrical biosensors. Measures up to 11.9mm with sensors included.

* Specified weight references the case only and does not include the weight of the band. The 44mm model weighs up to 53.3g with Sport Band in size M/L installed. The 40mm model weighs up to 47.9g with Sport Band in size S/M installed.

* Key feature may different from Key Spec

* Images are for illustration purposes only and the accessories are sold separately.

* Features and specifications are subject to change without prior notification and may vary per country, please check in store for more details.

* Dimension: Size and weight may vary by the device's configuration and manufacturing process.

* Memory size: User memory is less than the total memory due to storage of the operating system and software used to operate the phones features. Actual user memory will vary depending on the mobile phone operator and may change after software upgrades are performed.

* External Memory may be used to store media (photos, video, and music files) but application storage on external device may be limited or unavailable on certain handset models.

* Data - Internet connection required. Data and subscription charges may apply. Content subject to availability in country.

* Notice to our customers - safe battery use (certain Mobile devices don’t have removable back covers and customer removable batteries - In this case the battery is a Service replaceable part and not a customer replaceable part and special tools are required).

* In case of repair, Devices without removable batteries should be booked with a Samsung Authorised Service Centre. Please purchase Samsung-branded batteries from reputable and approved sellers to ensure the batteries are not counterfeit.

* Use only Samsung-approved accessories. Using unapproved accessories will not be covered by the warranty, and may cause performance problems and malfunctions as well as damage the device.