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Samsung

Samsung Galaxy Watch 4 44MM SM-R870 Aluminum Smartwatch GPS Only - Green (Renewed)

  • Based on 1,305 reviews
Condition: Refurbished - Excellent
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Availability: Only 1 left in stock, order soon!
Fulfilled by DNCL-TECHZONE
Arrives Tuesday, Jun 2
Order within 9 hours and 13 minutes
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Size: 44 Mm


Style: Bluetooth


Color: Green


Features

  • 1.4" (34.6mm) Super AMOLED, 450 x 450px Resolution, 16M Colors, 40-Hr Run Time, 361mAh Battery, Digital Bezel, Aluminum Frame, Sports Band, Bluetooth 5.0, Wi-Fi
  • 16GB 1.5GB RAM, CPU: Dual-core 1.18 GHz Cortex-A55, Android Wear OS, One UI Watch 3, Exynos W920, Compatible with Android devices
  • Glass front (Gorilla Glass DX+), MIL-STD-810G compliant, 50m water-resistant (IP68), Compatible with standard 20mm straps, ECG certified, Blood pressure monitor
  • Sensors: Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor, Optical Heart Rate Sensor, Electrical heart sensor, Bioelectrical Impedance Analysis Sensor
  • Extension of Your Phone Galaxy Watch4 Classic works as an extension of your phone so you can talk, stream and text from your wrist on the go.

Description

This pre-owned or refurbished product has been professionally inspected and tested to work and look like new. How a product becomes part of Amazon Renewed, your destination for pre-owned, refurbished products: A customer buys a new product and returns it or trades it in for a newer or different model. That product is inspected and tested to work and look like new by Amazon- qualified suppliers. Then, the product is sold as an Amazon Renewed product on Amazon. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee.

Operating System: Android Wear OS


Memory Storage Capacity: 16 GB


Special Feature: GPS


Battery Capacity: 361 Milliamp Hours


Connectivity Technology: Bluetooth


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Ion


GPS: True


Shape: Round


Screen Size: 44 Millimeters


Operating System: Android Wear OS


Additional Features: GPS


GPS Geotagging Functionality: True


Band Material Type: Aluminum


Case Material Type: Aluminum


Water Resistance Level: Water Resistant


Sport Type: Fitness, Running


Human Interface Input: Touchscreen


Supported Application: Blood Pressure Monitor, Heart Rate Monitor


Water Resistance Depth: 50 Meters


Supported Satellite Navigation System: GPS


Controller Type: Android


Metrics Measured: Multiple


Closure Type: Buckle


Shape: Round


Style Name: Bluetooth


Color: Green


Band Color: green


Connectivity Technology: Bluetooth


Wireless Compability: Bluetooth


Wireless Provider: Unlocked


Cellular Technology: LTE


Communication Feature: Yes


Sim Card Size: eSIM


Item Dimensions: 1.75 x 1.7 x 0.39 inches


Memory Storage Capacity: 16 GB


RAM Memory Installed: 1.5 GB


Brand: Samsung


Model Name: galaxy


Target Audience: Unisex Adult


Age Range Description: Adult


Model Number: R870


Built-In Media: Band, Charger, Watch


Warranty Description: 90 days limited warranty


Wearable Computer Type: Smart Watch


UPC: 656942337713


Global Trade Identification Number: 13


Manufacturer: Samsung Electronics


Battery Capacity: 361 Milliamp Hours


Battery Cell Type: Lithium Ion


Battery Average Life: 1 days


Battery Charge Time: 2 Hours


Battery Power: 1.4 Watt Hours


Screen Size: 44 Millimeters


Display Type: AMOLED,Digital


Resolution: 450 x 450


Compatible Devices: Smartphone


Compatible Phone Models: Samsung and Android devices


Warranty Type: Limited


Waterproof Rating: [N/A]


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 2

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Watch was great
Size: 44 Mm Style: Bluetooth Color: Black
For a refurbished item is great everything working and battery life is great and it was easy to connect. Only bad thing is it has was a small scratch but it barely noticeable but perfect for a refurbished item.
Reviewed in the United States on March 6, 2026 by Edgar
    • Functionality and Looks are good as advertised!
Size: 44 Mm Style: Bluetooth Color: Green
So far, a perfectly fine fitness watch. No obvious malfunction or internal mechanical issues yet until after 5 days of use! Battery if used in saving mode will probably last 2 days? But if someone wants to use this watch for any specific sports related tracking longer than 4 or 5 hours a day then battery life could be limited to 15 to 16 hours or less! Otherwise, a good functioning of fitness watch. Hopefully it lasts at least a year or two? ... show more
Reviewed in the United States on January 7, 2026 by Incognito SF
    • Mine is excellent, looks & functions like new.
Size: 44 Mm Style: Bluetooth Color: Black
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. ... show more
Reviewed in the United States on January 8, 2024 by Kenneth S
    • Great Watch at Great Price.
Size: 44 Mm Style: Bluetooth Color: Black
Review Image by Valerie
Review Image by Valerie
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. ... show more
Reviewed in the United States on January 26, 2023 by Valerie
    • Good Stuff
Size: 44 Mm Style: Bluetooth Color: Black
Legit
Reviewed in the United States on April 25, 2026 by Tanya Douglas
    • Galaxy watch 4
Size: 44 Mm Style: Bluetooth Color: Green
Yes worked excellent would buy again
Reviewed in the United States on March 26, 2026 by Alex Nieto
    • Would not recommend
Size: 44 Mm Style: Bluetooth Color: Black
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. ... show more
Reviewed in the United States on October 4, 2025 by Mika
    • Amazing watch
Size: 44 Mm Style: Bluetooth Color: Black
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 . ... show more
Reviewed in the United States on October 3, 2025 by Jacqueline White

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