Specifications
Screen Size44 millimetersTouch ScreenYesOperating System CompatibilityAndroidOperating SystemAndroidApp CompatibleYesCarrierUnlocked
Key Specs
Screen Size44 millimetersTouch ScreenYesOperating System CompatibilityAndroidOperating SystemAndroidApp CompatibleYesCarrierUnlockedInternal Memory Capacity16 gigabytesGlobal PositioningGLONASS, GPS, GalileoUsage Time40 hoursMetrics MeasuredSteps taken, Duration of sleep stagesWater ResistantYesMaximum Depth of Water Resistance164 feetBand MaterialFluoroelastomerSeriesBT
General
Product NameGalaxy Watch4 Aluminum Smartwatch 44mm BTBrandSamsungProduct TypeSmartwatchForm FactorWristwatchModel FamilySamsung Galaxy Watch4Model NumberSM-R870NZKAXAASeriesBTColorBlackColor CategoryBlack
Design
Case Size44mmCase ShapeRoundCase Thickness0.39 inchesBand TypeSport BandBand Width0.79 millimetersBand ColorBlackClasp TypeBuckleRotating BezelNo
Display
Display ScreenYesScreen Size44 millimetersTouch ScreenYesScreen Resolution450 x 450Display TypeAMOLEDColor DisplayYesClock DisplayYesBacklit DisplayNoAdjustable BrightnessYesCustomizable Watch FacesYesScreen MaterialCorning Gorilla Glass DX+
Compatibility
Operating System CompatibilityAndroidOperating SystemAndroidApp CompatibleYesWorks WithGoogle Assistant, SmartThingsVoice Assistant Built-inBixby, Google Assistant
Connectivity
Data Plan RequiredNoCarrierUnlockedBluetooth EnabledYesBluetooth Version5.0NFC TechnologyYesWi-Fi CompatibilityWireless A, Wireless B, Wireless G, Wireless N
Features
Internal Memory Capacity16 gigabytesGPS EnabledYesGlobal PositioningGLONASS, GPS, GalileoUsage Time40 hoursMobile NotificationsYesAlert TypeAudible, Vibration, VisualMobile Payment Service SupportedSamsung Pay, Google PayMusic PlayerYesSilent AlarmYesVibration AlertYesBuilt-In MicrophoneYesVoice ActivatedYesLanguages SupportedEnglish, American Sign Language, Spanish, Chinese (simplified), Tagalog, Vietnamese, Arabic, French, Korean, Other
Activity
Metrics MeasuredSteps taken, Duration of sleep stagesMulti-Sport TrackingYesSensorsAccelerometer, Barometer, Gyro sensor, Geomagnetic sensor, Ambient light sensor, Optical heart rate (PPG) sensor, Electrical heart rate (ECG) sensorNumber of Sensors5Medical Incident Notification911/EMS, App alert, Contact call, Contact text
Performance
Water ResistantYesMaximum Depth of Water Resistance164 feetShock ResistantYesMaximum Height of Shock Resistance4.92 feetDust ResistantYesIngress Protection (IP) RatingIP68Minimum Operating Temperature32 degrees fahrenheitMaximum Operating Temperature95 degrees fahrenheit
Processor
Processor Speed1.18 gigahertzCentral Processing UnitExynos W920 Dual Core 1.18GHzGraphics Processing Unit (GPU)Exynos W920System Memory (RAM)1.5 gigabytes
Dimensions
Product Height1.70 inchesProduct Depth0.38 inchesProduct Weight1.0688 ounces
Power
RechargeableYesBattery Strength IndicatorYesBattery Capacity361 milliampere hoursCharging Time110 minutesCharging Interface(s)WirelessWireless Charging StandardQiBattery TypeLithium-ionReplaceable BatteryNo
Material
Band MaterialFluoroelastomerCase MaterialAluminumCase Back MaterialAluminum
Camera
Integrated CameraNo
Dimension
SizeLargeMinimum Wrist Size8.3 millimetersMaximum Wrist Size9.1 millimetersBand SizeAdjustable, 5-1/8"Product Width1.75 inches
Warranty
Manufacturer's Warranty - Parts1 yearManufacturer's Warranty - Labor1 year
Other
UPC887276550886
Crush workouts and all your health goals with Samsung Galaxy Watch4. Be your best with the watch that knows you best.
Body Composition Analysis
Get ready to crush your wellness goals with body readings right on your wrist.
Advanced Sleep / Continuous SpO2
Manage your overall sleep quality for a great night's sleep with an advanced tracker that calculates your sleep score.
ECG
Be smart about your heart with ECG Monitoring that gives accurate readings.
Fitness / Auto Workout Tracking
Make the most of every workout with Auto Workout Tracking. Stay motivated by connecting to live coaching sessions via your smartphone or to dynamic Group Challenges with your friends.
V02 Max / Advanced Run Coaching
Make the most out of every mile with Advanced Run Coaching and VO2 max readings to assess your cardio levels.
Extension of Your Phone
Stay in stride while staying connected to calls, text and music on the go.
Upgraded OS (GSuiteApps)
Tap into the power and convenience of select Google services and apps on your wrist.
Sleek and Lightweight Design
Look great while crushing every part of your day with the sleek, lightweight and customizable design.
Group Challenges
Get moving and motivated with your family and friends. Join the fitness fun with activities and challenges designed just for groups.
Trip Detection
Get peace of mind while on the go with Trip Detection that sends an SOS to your emergency contact in the event of a hard fall.
Women’s Health
Galaxy Watch4 helps women build a deeper connection with their bodies and their health by helping to log and track fertility windows, ovulation cycles and periods.
Samsung Health
Samsung Health helps you stay on top of your health, your goals and upcoming fitness needs.
Payments
Tap. Pay. Go. Samsung Pay and Google Pay make quick stops even quicker.
SmartThings
Cool down the house as you cool down from your workout with a tap of your wrist.
Ecosystem
Breeze through your fitness goals by pairing your compatible Galaxy devices and by connecting to your fitness community.
What's Included
Device
Wireless Charger
Quick Start Guide
Search
Q: QuestionWhat is the difference between BT and LTE? What does BT stand for?(5 answers)
A: AnswerThat is a great question, Jaxlaw! BT stands for the Bluetooth version of this device. The difference between the Bluetooth and the LTE version of the Galaxy Watc4 is that the LTE version allows you to call, text, etc. without your phone being nearby. This is done once it is activated through your phone carrier. The Bluetooth version allows you to use these features while it is connected to your mobile device. Thank you for taking the time to ask these questions. ^KaylaAnswered by Samsung
Q: QuestionWhat is the difference between the GPS model and the unlocked model?(2 answers)
A: AnswerThe unlocked model is the model that comes with the ability to connect to cell service and work separately from a phone for calls and such.Answered by EthanMG
- A: AnswerNo the watch only comes with a rubberized band that has 10 holes in it, and the remainder flap is supposed to be tucked under the watch..it will make your wrist sweat easily. I'm supplying length of watch with band, smallest hole attached, and last hole attached for reference
Answered by Piranha
Q: QuestionDoes this or any new Samsung watch 4 have Blood Pressure and ECG?(2 answers)
A: AnswerYes the watch has both, but only the ECG feature is authorized for use in the United States as of now. The blood pressure feature is not.Answered by Souggie
Q: QuestionIs this watch waterproof?(3 answers)
A: AnswerSamsung says it's IP68 and that you can swim with it and track your swimming. You have to put the watch in water mode before getting it wet. It plays a tune when you take it out of water mode to push water out of the speaker holes. The only thing is Samsung will not honor the warranty for water damage. That's why I bought mine at BestBuy and bought an extended warranty from themAnswered by Retired
Q: QuestionDoes this device have fall detection?(3 answers)
A: AnswerYes, all the new Samsung model 4 smartwatches have it.Answered by Danny
- A: AnswerWhen in Airplane mode it will let it just display the watch face to tell time only menu is still available as well as settings but no "internet" connection.
Answered by ThatGirlDanielle86
- A: AnswerYes, the bands can be removed very easily just like they were in the last couple of releases, Samsung has made it very easy for you to buy bands, even if they are from actually watches you own. I'm not sure if they will be releasing their own line of bands though, no word on that just yet.
Answered by BRND
Samsung - Galaxy Watch4 Aluminum Smartwatch 44mm BT - Black
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Reviews
Rating 4.6 out of 5 stars with 2598 reviews
4.6Rating by feature
- 4.3Battery Life
Rating 4.3 out of 5 stars
- 4.6Durability
Rating 4.6 out of 5 stars
- 4.7Comfort
Rating 4.7 out of 5 stars
23 expert reviews
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Rated 5 out of 5 stars
Wear OS and Tizen is a dream
This is the first watch to come with Wear 3, the unified platform from Google+Fitbit and Samsung. The goal was to merge Google's large app ecosystem with Samsung's performance and battery life, plus Fitbit's health capabilities. After using this watch for a few days, I can finally say I don't really miss my Apple Watch from when I used iPhone. First off, the design. This watch is light, but feels super premium and holds up well. For an aluminum build, this feels much more expensive then that. It's super smooth and looks well polished. I've taken the watch tubing down a river, dirt road biking, and of course through everyday work life, and the watch doesn't even show a scratch. The performance of this watch is pretty fast. Everything loads WAY faster then my previous Wear 4100 powered Wear 2 watch, and that's even with the pleasing animations of the watch faces and tiles widgets. The only thing that has a notable delay is pulling up Samsung Pay, which even then is around a 0.5 second wait. Battery life is around 2 days when I'm pushing it with GPS tracking and always on workout display, I can get 3 days when not using the GPS. I haven't used a Wear OS watch that's actually lasted more then 24 hours so this was pretty impressive for me, but coming from Tizen watches this might be a little downgrade. Finally, the software. The one downside to previous Samsung Wearables was the lack of apps in the Galaxy Store. The problem with Wear OS was lackluster performance and battery. Imagine a software solution where neither of those is a problem. This is what the new Wear 3 is like. You have full access to the Google Play store from this watch, which has WAYYYY more apps then the Galaxy Store. Then you have a familiar UI that looks just like, and performs just as fast as, Tizen. You also get a fast watch that has good battery life too. I really have zero complaints with this watch. While I have no concerns, there still might be a few things you want to consider, as these might affect you. -Currently, you can't switch Bixby for Google Assistant. Samsung says it's coming soon. In the meantime, Bixby works well enough. -ECG is only available when paired with a Samsung phone. Not a selling point for me, my old Galaxy Watch 3 never actually let me use this feature because I'm too young anyways, haha. -Due to the OS switch, the Galaxy Watch 4 series is not compatible with iPhone. If you have an Android phone, this watch is the best you can get for now regardless of what you want from your smartwatch. As more manufacturers release Wear 3 powered watches, this may possibly change, but seeing how no one else has even rumored a Wear 3 watch yet, that might be a long time away.
This review is from Samsung - Galaxy Watch4 Aluminum Smartwatch 44mm BT - Silver
Posted by SeaboundAvian
Rated 5 out of 5 stars
One of the Best Android Smart Watch
Amazing value for all the features. For me this is the first proper smart watch for Android. Anything below this is not worth it and even v5 does bring much extra, so this is the best value for what you get. I've been using for quite some time and I'm really happy with it. Great performance, features and durability. Totally recommended. I have a Samsung phone tho, don't really know how good will work with other android phones.
Posted by Adrian
Rated 5 out of 5 stars
If youre a samsung user: must have
First time smart watch purchase. Especially during promo season these are a 100% must have for your ecosystem. The UI is smooth, the functionality is absurd, and the customization options really make the watch your own!
Posted by Abcd