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Samsung

Samsung Electronics Galaxy Watch 4 40mm Smartwatch with ECG Monitor Tracker for Health Fitness Running Sleep Cycles GPS Fall Detection Bluetooth US Version - (Black) (Renewed)

  • Based on 1,004 reviews
Condition: Refurbished - Excellent
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Availability: 16 left in stock
Fulfilled by Amazon
Arrives Tuesday, Jun 2
Order within 5 hours and 12 minutes
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Color: Black


Features

  • Get Ready To Crush Your Wellness Goals With Body Readings Right On Your Wrist
  • 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

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: Wear OS Powered by Samsung


Memory Storage Capacity: 1.5 GB


Special Feature: GPS


Battery Capacity: 247 Milliamp Hours


Connectivity Technology: Bluetooth


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Ion


GPS: True


Shape: Heart,Irregular


Screen Size: 40 Millimeters


Operating System: Wear OS Powered by Samsung


Additional Features: GPS


GPS Geotagging Functionality: True


Band Material Type: Silicone


Case Material Type: Aluminum


Water Resistance Level: Water Resistant


Sport Type: Fitness, Running


Human Interface Input: Touchscreen


Supported Application: GPS, Sleep Monitor


Water Resistance Depth: 50 Meters


Supported Satellite Navigation System: GPS


Controller Type: Android


Metrics Measured: Sleep Duration,Step Count,Distance,Heart Rate,Calories Burned,Breath Rate,Blood Pressure


Closure Type: Buckle


Shape: Heart,Irregular


Style Name: Modern


Color: Black


Band Color: black


Screen Size: 40 Millimeters


Display Type: AMOLED


Resolution: 396 x 396


Compatible Devices: Smartphone


Compatible Phone Models: Android smartphones


Memory Storage Capacity: 1.5 GB


RAM Memory Installed: 1.5 GB


Warranty Type: Limited


Waterproof Rating: IP68


Brand: Samsung


Model Name: galaxy


Target Audience: Unisex Adult


Age Range Description: Adult


Model Number: Galaxy Watch4


Built-In Media: Band, Charger, Watch


Warranty Description: 90 days limited warranty


Wearable Computer Type: Smart Watch


UPC: 702338536113 686457982917 656942418658


Manufacturer: Samsung


Battery Capacity: 247 Milliamp Hours


Battery Cell Type: Lithium Ion


Battery Average Life: 40 Hours


Connectivity Technology: Bluetooth


Wireless Compability: Bluetooth


Wireless Provider: Unlocked


Cellular Technology: LTE


Communication Feature: Bluetooth


Sim Card Size: eSIM


Item Weight: 25.9 Grams


Item Dimensions: 7 x 4 x 5 inches


Band Length: 220 Millimeters


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

    • Good but large smart watch Good but large smart watch
Review Image by Amazon Customer
Review Image by Amazon Customer
Review Image by Amazon Customer
Review Image by Amazon Customer
Review Image by Amazon Customer
First off, the seller I got this from was great. Arrived on time. Watch didn't have a single scuff or smudge on it. Literally like new. Box is generic, but everything inside looks original including the charger and the manuals. The battery was a little low (56%) when I got it, so I gave it a charge before set up and it was full in no time. Watch itself is great. Easy set up as long as you follow the directions and use the app. Picked a simple watch face and called it good. The main complaint I saw about this watch is the battery life. I read up before getting it and adjusted settings right off the bat. I don't keep the face on all the time (1. For battery life and 2. Some users had screen burn) I don't care much for the health things, so I have all preferences like the bpm monitor set to manual so I use them as I see fit instead of them either going continuously or every 10 minutes. If you have bad eyesight like me, use the large font setting And for the love of everything, download the Gboard app. Like literally right out of the box past set up, get it. Otherwise you have to use T9 and text like it's 2000 again. The only downside (for me) is I have tiny wrists and the standard band is way too large. There are large gaps on either side. This isn't really a downside, I just had to spend a little extra on a new band. No biggie. Over all, great watch. I may just get my partner one too. (It now has a walkie-talkie app!) ... show more
Reviewed in the United States on April 13, 2022 Reviewed in the United States on April 13, 2022 by Amazon Customer
    • Good smartwatch
I got this watch because of its features. I recently had heart surgery to replace an Aortic valve and I had Afib too which was caused by the bad valve. With this watch I can do an ECG and check to make sure I'm not in Afib, which my Doctor checks also, and it gives me some reassurance, I know it's not medical grade but I feel good that I can check it too. I like how it keeps up with my steps, sleep, heart beats and all of the other things too. I think it's a real good watch, just a little big though and the battery life could be better. ... show more
Reviewed in the United States on March 10, 2024 by twoshot
    • Great
As advertised. Works great. Holds charge for about a day. Simple to connect ,
Reviewed in the United States on May 18, 2026 by RaeAnna Thomas
    • Love it so far! Love it so far!
Review Image by Amber
My samsung watch looks and works good. The band looks and feels new, very comfortable. I think it may have had some grime left in the corners of the screen edge. But otherwise looks new. No blemishes or scratches. 40mm. Has great features like sleep tracking and heart rate and activity monitoring. I charge mine for under 30 minutes in the morning and the evening. Battery life seems to depleate quickly. Amazing watch for the price. (Refurbished) ... show more
Reviewed in the United States on August 20, 2025 Reviewed in the United States on August 20, 2025 by Amber
    • REFURB SCAM
Purchased a refurbished watch in excellent condition to replace the Active2 that I'd had for years. The watch seemed to work great at first. But just after the 90 return window it started having issues charging. It would show low battery after only 10 hours. Since I have another smart watch I switch this one out with, so I can monitor sleep, it didn't seem like a big deal. Then it started randomly powering off during the day and when I'd get it back on the charger it would show that some battery life was still remaining and I could turn it back on. After a few week though, it stopped even doing that. Now it will start to load the intro screen and freeze. I did troubleshooting with Samsung and they recommended I contact the seller. I messaged the seller and have yet to get any response. This was a crappy refurbishment that was patched for just long enough for the buyer to not be able to return. ... show more
Reviewed in the United States on April 17, 2026 by Samantha W
    • Features watch provides
Love it. I bought this watch to count my steps but I find that I am enjoying other features it provides. Notifications of emails, calls and text messages when I'm not carrying my phone at work. I'm not much of a techy, but, i love this watch.
Reviewed in the United States on May 8, 2026 by Mario Marrufo
    • Great Watch. Charging and Battery life suck though
I love all the features this watch has to offer. It has so many way to customize it, and it does everything the average Fitbit does and more. It's not a bad price either. My biggest qualm with it is charging it. The magnet on the charger isnt very strong and doesn't hold the watch very well making it easy to bump it and stop the charge, or if you don't place it just right it won't charge at all. Another thing to mention is that you have to use a wall charger that only outputs 1 amp. Anything higher and the watch will freak out. I bought a refurbished watch and it didn't come with a wall charger or an instruction manual or anything so it took a lot of research to figure that out. Also the battery life is terrible. If you have the constant heart rate monitor and the raise wrist to wake feature enabled the battery dies within 16 hours, so you have to charge it every night which means you can't really use the sleep monitoring functions. Other than that the watch is great. I'd recommend doing some research though and if there is a later model with a better battery life, go for that one. ... show more
Reviewed in the United States on May 29, 2023 by Spencer Andrus
    • Great Watch Great Watch
Review Image by Gavin
Review Image by Gavin
Review Image by Gavin
Review Image by Gavin
NB - Reviewing an Amazon renewed 40mm Galaxy Watch 4. The watch has no defect I've been able to spot. As of writing this, I've been using it for a little over 48 hours. There are some scratches on the rim and at the screw areas, indicating that it's not brand new. Also, it takes around 60-90 mins to get to full charge from a dead battery, and at the end of an 8hr work day, it's at 48%. It can run hot while charging so look out for that. Seems like the heat can drain the charge as well. ... show more
Reviewed in the United States on March 25, 2024 Reviewed in the United States on March 25, 2024 by Gavin

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