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Samsung

Samsung Galaxy Watch 4 40mm Bluetooth Smartwatch with ECG Heart Monitor, Tracker for Health, Fitness, Running, Sleep Tracking, GPS Fall Detection, US Version, SM-R860NZKAXAA, Black

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Availability: 11 left in stock
Fulfilled by Amazon
Arrives Thursday, Nov 27
Order within 14 hours and 50 minutes
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Color: Black


Size: 40mm


Style: Bluetooth


Features

  • BODY COMPOSITION ANALYSIS: Galaxy Watch4 is the first smartwatch to off body composition data right on your wrist, On your own schedule, now you can get readings on body fat, skeletal muscle, body water, basal metabolic rate, and Body Mass Index.Supported Application:Heart Rate Monitor,Sleep Monitor,Fitness Tracker. Connectivity technology:LTE,Bluetooth,GPS. Wireless comm standard:Bluetooth
  • BETTER SLEEP STARTS HERE: Wake up feeling refreshed and recharged with advanced sleep tracking; When you go to bed, your Galaxy Watch4 sleep tracker starts monitoring your sleep and SpO2 levels continuously
  • BE SMART ABOUT YOUR HEART: Take care of your heart with accurate ECG monitoring and keep an eye on possible atrial fibrillation, a common form of irregular heart rhythm; Share personalized readings with your doctor using the Samsung Health Monitor app on your compatible Galaxy phone
  • MAKE EVERY WORKOUT COUNT: Get the most out of every exercise session with advanced workout tracking that recognizes 6 popular activities, from running to rowing to swimming, automatically in just 3 minutes; Stay motivated by connecting to live coaching sessions via your smartphone or to dynamic Group Challenges with your friends
  • GO THE EXTRA MILE: Improve your runs with advanced running coaching technology; VO2 Max readings assess your oxygen levels to manage and track your heart and lung endurance
  • EXTENSION OF YOUR PHONE: Put the phone features you need right on your wrist and stay connected to calls, texts, notifications, and music streaming, all accessible with a simple tap
  • GOOGLE ON YOUR WRIST: Tap into the power and convenience of select Google services and apps right from your wrist; Pay for coffee; Get directions to the park; Use Bixby or Google Assistant for help on almost any topic; Stream your favorite tunes on YouTube

Description

Crush workouts and all your health goals with Samsung Galaxy Watch4, the smartwatch that gets you. Push yourself to the next level with Auto Workout Tracking, Advanced Run Coaching, and Group Challenges. Track heart and lung endurance with oxygen level monitoring. Combining style and function, Galaxy Watch4 offers a number of fashionable bands to match your every mood and all day comfort to keep you looking great from the locker room to the conference room. Staying on top of your day on the go is a breeze with Google app integration and call-text-notification connectivity. Galaxy Watch4 delivers everything you need to conquer your day, no matter where you are or what’s on your plate. Leave your phone behind while staying connected — call, text and stream music, all from your wrist with LTE connectivity. The Samsung BIA is a body analyzer that uses bioelectrical impedance analysis (BIA) technology to track body composition based on weight, body fat, body mass index (BMI), skeletal muscle, body water and basal metabolic rate (BMR) measurements. It is not intended to specifically diagnose or treat a medical condition. The SpO2 measurement software is not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease. The snoring measurement requires smartphone with Android 6.0 or later, 1.5GB of RAM, phone within 2 feet of user, with snore detection enabled through Samsung Health app version 6.18 or higher. Requires Samsung Health app version 6.18 to view history. For clinical trial results concerning the accuracy of the ECG monitor, visit https// ECG monitor app is not intended to replace traditional methods of diagnosis or treatment and is for information purposes only. The ECG monitor app is not intended for users with known arrhythmias other than atrial fibrillation or users under 22 years old. Users should not interpret or take clinical action based on the device without consultation of a qualified healthcare professional. Requires Samsung Galaxy smartphone with Android 7 or later and Samsung Health Monitor app available only at the Samsung Galaxy app store. Water-resistant up to 50 meters per ISO standard 22810:2010. Not intended for scuba diving. Avoid excessive, sudden temperature changes and high-velocity activities. Rinse in fresh water/dry after use in sea water or chlorinated water. Consistent with IPX8 rating, water resistant in up to 5 feet of water or up to 30 minutes. Rinse residue/dry after wet. All participants must have the latest version of the Samsung Health app, downloadable via Galaxy Store and/or Google Play Store. The VO2 max software functions are not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease. Accurate VO2 max reading requires running outdoors for at least 20 minutes with GPS on; consult user manual before use. Compatible with select Bluetooth capable smartphones running Android 6.0 or higher and RAM above 1.5GB. Galaxy Watch4 Series supported features may vary by carrier and compatible device. For a list of compatible smartphones and features please visit https// watch/devicecompatibility. For best results, connect with compatible Samsung Galaxy smartphones. Google is a trademark of Google LLC. Google Maps: Must be paired with a smartphone running Android 6.0 or higher that supports Google Mobile Services. Google, Google Assistant, and YouTube Music are trademarks of Google LLC.

Operating System: Android


Memory Storage Capacity: 16 GB


Special Feature: ECG, Sleep Monitor, Activity Tracker, GPS, Bluetooth, Heart Rate Monitor, Wireless, Daily Workout Memory, Notifications, Music Player See more


Battery Capacity: 12 Milliamp Hours


Connectivity Technology: Bluetooth, GPS, LTE


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Ion


GPS: Built-in GPS


Shape: Heart


Screen Size: 1.2 Inches


Product Dimensions: 1.59 x 1.54 x 0.38 inches


Item Weight: 0.914 ounces


Item model number: SM-R860NZKAXAA


Batteries: 1 Lithium Ion batteries required. (included)


OS: Android


Wireless communication technologies: Bluetooth


Connectivity technologies: Bluetooth, GPS, LTE


GPS: Built-in GPS


Special features: ECG, Sleep Monitor, Activity Tracker, GPS, Bluetooth, Heart Rate Monitor, Wireless, Daily Workout Memory, Notifications, Music Player


Other display features: Wireless


Human Interface Input: Buttons, Touchscreen


Scanner Resolution: 390 x 390


Color: Black


Whats in the box: Band, Charger, Watch


Department: mens


Manufacturer: Samsung


Date First Available: August 11, 2021


Weight: 25.9 Grams


Standing screen display size: 1.2 Inches


Memory Storage Capacity: 16 GB


Ram Memory Installed Size: 1.5 GB


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Nov 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Solid android-compatible smart watch
Color: Pink Gold Size: 40mm Style: Bluetooth
I decided to upgrade from a fitness band/watch garmin device to this smart watch. I know there are about 3 subsequent versions of this, but mine still works very well after over 2 years. Positives: - I like being able to see at least part of incoming text messages so I can decide if I need to pull out my phone to read them on a larger screen. - The do-not-disturb feature is very helpful in muting text messages when I can't afford interruptions - I do like the variety of fitness tracking options, as well as health and sleep - The battery life is still pretty good even after several years Negatives/downsides: - I still find it hard to cancel notifications rather than just snooze them (the swipe to clear feature doesn't always work--could be the screen protector I use) - It took me a while to realize that having the watch on DND means that calls won't go through on my phone even if the volume is on for that device - Battery does have to be charged each night, which limits the usability for sleep tracking (unless I charge it earlier and then can't track activity/steps) Overall still a quality device and I haven't been compelled to upgrade yet. ... show more
Reviewed in the United States on May 13, 2025 by JJAmazonShopper
    • Great value
Color: Pink Gold Size: 40mm Style: Bluetooth
Love the color. Bams is perfect, even for my very small wrists. Connects to my phone with no issues. I do wish the battery lasted a little longer. Seems to track activity accurately.
Reviewed in the United States on September 22, 2025 by MaryAnn
    • Great Watch - Not Perfect
This is my 3rd "Smart Watch". My 1st was a Garmin which was very basic and bought by my wife. I was an avid runner and that was the Garmin's main intended purpose. However, shortly after receiving it, I had to give up running due to prolonged issues with my hip. So, it became a very expensive heart rate monitor - a function at which it excelled. My 2nd watch was a Fossil watch which was an impulse buy. It was visually attractive but excelled at nothing else. It sits on my bedside table and is rarely worn - poor integration with my phone and poor battery life make it slightly better than useless. [A cautionary tale against impulse buying.] I have been hesitant to pull the trigger on a more expensive smart watch but I lost the Garmin watch and really missed having a continuous HR monitor when I exercised. I am an old dude but my fitness is very important and HR zone targets have a proven benefit. It also keeps me on track in the gym. Well, I saw the "renewed" version of this watch, and the price point made it an almost painless proposition to give it a try. So far I love it. I have a collection of watches and usually rotate them for work but since buying this watch all of my other watches are collecting dust. The setup was painless. I have begun using an exercise app that has a continuous HR monitor and workout timer. This is the feature that is most important to me but I love playing with the other features. I emphasize "playing" because none of the other features are terribly important to me - they are merely novelties. But over time I feel some of the features will become second nature. I love being able to see my messages on the watch while at work but with Android I can just as easily see my messages on my laptop while at work [can't do that with Apple!]. Overall, a solid watch. MAJOR CON: battery life. Given the small footprint of this watch, and all that it is doing in the background, I feel a bit like an entitled brat complaining about the battery life but, if I could change one thing, that would definitely be it. ... show more
Reviewed in the United States on April 9, 2023 by swt
    • Upgrade from Active2?
I am a fan of smart watches, over the years I have had a Pebble, then a progression of Samsungs-- Gear Fit, Gear Fit Pro, Gear Sport, and Active2. Before smart watches I was a collector of mid-tier mechanical watches, attracted to watch faces that I liked. (Looking at you Lum-Tec!). Smart watches did not attract me for fitness tracking, but rather for the multitude of available watch faces. Truth be told, I do like the form factor of apple watches, but the 24-hour battery life and needing an iphone are reasons I originally decided to steer towards Samsung. My primary uses are for call / text notifications, Ring door alarms, exercise and sleep monitors, and timers/alarms. Much has been written about Samsung watches, and based on Amazon comments there seems to be a love-hate relationship with the Watch 4, so I am just going to limit my comments to a couple of points. First, battery life. I was happy with the Active2. Battery life with both the prior Active2 and this new Galaxy Watch 4 is OK, not great, for me, usually 2-3 days...The initial setup scheme, unlike the Active2, showed less than 24 hours use from 100 to 12%--so I understand where "poor battery" comments come from. Over time and charging cycles, dependent on the selected watch face, along with power saving tips, I can get a solid 3 days. Power saving tips. AOD “Always on” needs to be OFF, display set to 10 seconds, wrist flick screen OFF, HR measurements set to every 10 minutes except during daily exercise sessions, snore detection and blood oxygen at night need to be OFF, Wireless OFF, NFT toggled OFF. I also found that some settings were set to off, but actually on (blood O2 at night, set to off, but running at night. I had to reset the watch?). Battery life could be much better, Samsung really needs to look at how they implement defaults that consume power considering the vast number of comments that complain about short battery life. Second, initial setup. With the Samsung Gear app already installed on my pixel 4a 5G phone, set-up was easy with a switchover from my Active2. Most of my prior Active2 settings were carried over with the exception of NFT toggled back on, and a required update of the Samsung Health app to show my default exercises. Third, a new marketplace. My most frustrating moment was the fact that previously purchased watch faces are not carried over due to the switch to Wear OS, and away from Tizen. Samsung Marketplace is no longer used for Watch 4. Oh well. There are plenty of options from google play (add watch face to searches) and from Facer. Be aware, increasing the number of complications, animations, and colorful backgrounds seems to noticeably hit battery life. As indicated, I have found a number of preset options that give me a solid 3 days of battery life, with the power saving hints above in play. As for watch operation, it is all very familiar to me. I am learning the new operating system and menu. A positive surprise was a totally flat face allowing the use of glass screen protectors, very easily positioned and attached. The Active2 had a curved edge making the install of screen protectors more challenging and less durable along that same edge. I also like the design of the watch band, which sits mostly flush against the curved case, maybe following a styling cue from apple. If, like me, you had a prior Samsung watch, this is technically an "upgrade"--but lots of adjustments need to be made to obtain good battery life, and some operational issues persist. With the current deal it might be worth a try. IMO, Samsung still has some firmware work to do. ... show more
Reviewed in the United States on July 17, 2022 by Dan Leithauser

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