Amazon Renewed

Samsung Galaxy Watch4 44MM SM-R870 Aluminum Smartwatch GPS Only Renewed

90+ bought in the past month

$56.44$179.99
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About this item

  • Item Package Dimension- 6.7699999930946L X 4.2899999956242W X 2.399999997552H Inches
  • Item Package Weight - 0.29101018584 Pounds
  • Item Package Quantity - 1
  • Product Type - Wearable Computer
$56.44
Was $179.99Save $123.55

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Product details

Operating SystemWear OS
Memory Storage Capacity16 GB
Special FeatureGPS, ECG, Blood Pressure Monitor, Activity Tracker, Pedometer, Calorie Tracker, Daily Workout Memory, Oxymeter (SpO2), Accelerometer, Heart Rate Monitor, Phone Call, Text Messaging, Sleep Monitor See more
Battery Capacity361 Milliamp Hours
Connectivity TechnologyBluetooth
Wireless Communication Standard802.11a/b/g/n, Bluetooth
Battery Cell CompositionLithium Ion
GPSBuilt-in GPS
ShapeRound
Screen Size1.4 Inches

Technical specifications

product_dimensions1.75 x 1.7 x 0.39 inches
item_weight0.96 ounces
item_model_numberGalaxy Watch4
batteries1 Lithium Ion batteries required.
best_sellers_rank#1,178 in Amazon Renewed ( See Top 100 in Amazon Renewed ) #65 in Men's Smartwatches #101 in Renewed Smartwatches #575 in Smartwatches
osWear OS
ram1 GB
wireless_communication_technologiesBluetooth 5.0
connectivity_technologiesBluetooth
gpsBuilt-in GPS
special_featuresGPS, ECG, Blood Pressure Monitor, Activity Tracker, Pedometer, Calorie Tracker, Daily Workout Memory, Oxymeter (SpO2), Accelerometer, Heart Rate Monitor, Phone Call, Text Messaging, Sleep Monitor
display_technologyAMOLED
other_display_featuresWireless
human_interface_inputTouchscreen
scanner_resolution454 x 454
colorBlack
battery_power_rating361 Milliamp Hours
whats_in_the_boxBand, Charger, Watch
departmentmens
manufacturerSamsung Electronics
date_first_availableAugust 17, 2021
weight0.06 Pounds
standing_screen_display_size1.4 Inches
memory_storage_capacity16 GB
ram_memory_installed_size1.5 GB

Product videos

Product video 1

Customer reviews

4.41,416 ratings

Customers say

Customers find the smartwatch works well out of the box and appreciate its flawless condition, perfect appearance, and good value for money.

★★★★★

Good purchase

MorganOctober 17, 2025

Despite some of the negative reviews, ordered the Galaxy 4 refurbished (excellent condition). The watch came clean, free of scratches or defects. The wristband is clean and in perfect shape. No issues with the battery. No issues with the watch itself. Very easy to set up. Is exactly as ordered. Read more

★★★★★

Just like new

AshleyDecember 17, 2025

Great watch, great price. No scratches/dents or anything. I have been using it everyday day for months now. I have to charge it every day and a half to 2 days, buy it charges pretty quick. It came with the charger too. Would definitely buy again, if I needed too. Read more

★★★★★

Good Smart Watch Choice

TomNovember 5, 2025

This is a decent watch; I still use it to this day, and it works well, still getting updates. So when you charge it up, turn it off if otherwise, it will only charge halfway. So, what it does if you leave it on charging is it will charge to 100 % then charge down to like 75-65% I guess, to protect the battery from overheating or something Read more

★★★★☆

Great Watch at Great Price.

ValerieJanuary 26, 2023

I purchased a watch that is 'acceptable' condition wise. As you can see, there is one hairline scratch and a bit of scruff by the bezel. It doesn't interfere with the watch at all. There is also a smudge, but I have screen protectors and case covers coming today. You don't notice the blemishes if not in direct light either (photos taken under a light with flash, so I could make sure they were noticeable). Battery life isn't great, but it isn't terrible either. I would say it's average for a smart watch. I received the watch a few days ago, charged it a few minutes when it arrived, and didn't charge again until before bed - where I had 9% left. The watch finally learned my patterns and this morning, It said I had almost 1 day and 12 hours left, with just under 12 hours since the last full charge. The biggest battery hit for me is sleep tracking - I found out that it took 20% of my battery! Hopefully, I can figure out why that's using so much. There are a lot of faces and ways to customize the watch to your liking. You can even customize the side buttons within the settings on your phone (possibly watch as well, but it's easier for me to use phone). I've found tracking to be very close to my Garmin as well in all aspects. It's nothing to not choose this watch over a more expensive watch. HR is always exactly the same or within 3 beats (sometimes with the Garmin being higher/lower) in my testing/wearing them both for two days. I also like the auto pause feature, I haven't tested the automatic recording yet, so not sure if that will show a GPS route or not. I do wish it allowed for adding calories per day, yes I know there is a food log, but it's very simple. I use another app, so think it would be great to just be able to put the daily calories and have it pull into Samsung Health. It would give a better whole body experience, I'm sure. All and all this is a great watch that is capable of doing what's it's supposed to do and it's a great price - even if bought new. Read more

Review image 1Review image 2
★★★★★

Five stars

Rachael SizemoreDecember 20, 2025

Great condition. No scratches or stuffs. I've had it over a month now and it still works and charges great. Best watch i have ever owned. Five stars. Read more

★★★★★

Mine is excellent, looks & functions like new.

Kenneth SJanuary 8, 2024

It came in an Amazon renewed box—just the watch and charger. I can't find any scratches, the battery life seems to be what people are getting with a new one. I upgraded from an S3 Frontier. I watched several reviews but the best information came through Google AI. Here are the key differences " The Galaxy Watch 4 offers several significant improvements over the Galaxy Watch S3 Frontier Classic, especially in terms of features, software, and health sensors. Here's a breakdown of the key advancements: Software and Health Tracking: Operating System: The Watch 4 runs on Wear OS 3 (powered by Samsung's One UI Watch) compared to the Tizen OS on the S3. This provides access to a wider range of apps and improved interoperability with both Android and iOS devices. Advanced Health Tracking: The Watch 4 boasts a plethora of advanced health sensors not found on the S3, including ECG, blood oxygen saturation (SpO2) monitoring, body composition analysis, and advanced sleep tracking. Improved Fitness Features: The Watch 4 offers more workout tracking options, automatic activity detection, and enhanced coaching features for runners and other athletes. Performance and User Experience: Faster Processor and UI: The Watch 4 features a faster processor and smoother user interface compared to the S3, leading to a more responsive and fluid experience. Larger and Brighter Display: The Watch 4 has a larger and brighter display with a higher resolution, making it easier to read and navigate. Additional Features: The Watch 4 comes with several additional features not found on the S3, such as fall detection, voice recording, and built-in music storage. " One thing I will note is the weight difference. It's much lighter, I forget I have it on. Much easier to do sleep tracking. Read more

★☆☆☆☆

Would not recommend

MikaOctober 4, 2025

Bought watch for my brother who likes to do terrain/OCR runs and keep track of his workout stats. After fully charging the watch, starting wear at 10pm, sleeping overnight, a 30min run, the watch was already at 30% before noon the next day. Along with the short battery life, I've only had the watch for 3 days at this point and have already had to reset it once, losing all my information. Setting up after reset has been rough as well. For a brand name I expected better. I guess you get what you pay for. Will be returning. Read more

★★★★★

Amazing watch

Jacqueline WhiteOctober 3, 2025

These watches are amazing ! My husband and I LOVE our new watches . We are new to Samsung and we are very impressed . GREAT price for these watches. They look and act more expensive then what we payed for . Came in very good shape as well . How clear they are makes my apple watch look horrible . Texting is very easy on them too . Read more

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