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The Samsung SM-R810 is the Bluetooth-only 42 mm Galaxy Watch, not the LTE SM-R815 or the larger 46 mm SM-R800. It runs Tizen, has a 1.2-inch Super AMOLED display, and takes standard 20 mm watch straps according to Samsung. Here are its specifications and the practical limits to know before buying a used watch or replacement band.
Samsung SM-R810 specifications at a glance
| Specification | Samsung SM-R810 |
|---|---|
| Device identity | 42 mm Samsung Galaxy Watch; Bluetooth-only model |
| Operating system | Tizen |
| Processor | 1.15 GHz dual-core |
| Memory | 0.75 GB |
| Storage | 4 GB total; 1.5 GB available |
| Display | 1.2-inch (30.2 mm) Super AMOLED; 360 × 360 pixels |
| Wireless connectivity | Bluetooth 4.2, NFC, 2.4 GHz 802.11 b/g/n Wi-Fi |
| Location | GPS and GLONASS |
| Sensors | Accelerometer, barometer, gyroscope, heart-rate sensor, light sensor |
| Dimensions | 45.7 × 41.9 × 12.7 mm |
| Weight | 49 g |
| Battery | 270 mAh, non-removable |
| Water rating | 5 ATM (50 m / 165 ft) under specific conditions; see activity restrictions below |
| Band size | Standard 20 mm straps, according to Samsung |
These hardware details are listed on Samsung Business Ireland’s Galaxy Watch specifications page. Dimensions and weight refer to the listed watch body.
Is the SM-R810 Bluetooth or LTE?
The SM-R810 is the Bluetooth-only 42 mm model. It does not have cellular service. Samsung’s 4G references on the product page apply to the separate cellular version, not this model; the 4G 42 mm variant is SM-R815. The 46 mm Galaxy Watch is a different model, SM-R800.
Some calling and messaging features require a Bluetooth connection to a smartphone, according to Samsung. Phone compatibility and the features available can vary. For model-specific guidance, consult Samsung’s SM-R810 support page, which links the manual and compatibility information.
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What size band fits the SM-R810?
Samsung says that “even standard 20mm watch straps work,” so a standard 20 mm replacement strap is the directly supported size. Check the strap’s attachment and clasp design as well as its width before ordering; a stated 20 mm width alone does not confirm that every connector style will fit.
How long does the SM-R810 battery last?
The watch has a 270 mAh non-removable battery. Samsung publishes several scenario-dependent estimates: over 45 hours with the always-on display off, up to 120 hours under low usage, up to 9 hours of local music playback, up to 44 hours of indoor workout time, and up to 14 hours of outdoor workout time with GPS. Samsung also describes the 42 mm model as offering “up to 4 day’s battery life” based on light usage.
Rank #2
- 1.2 "(30.5mm) w/ Rotating Bezel, Super AMOLED, 396 x 396 pixels (~330 ppi density), 16M Colors, CPU: Dual-Core 1.15GHz, 247mAh Battery, Android Wear OS, One UI Watch 3, Bluetooth, Wi-Fi
- The Galaxy Watch4 Classic uses red LEDs and infrared rays to calculate your SpO2 levels or the amount of oxygen in your blood.
- Glass front (Gorilla Glass DX+), MIL-STD-810G compliant, 50m water-resistant (IP68), Compatible with standard 20mm straps, ECG certified, Blood pressure monitor
- 5 ATM / IP68 The water and dust resistance rating, Military-grade durability, Larger screen but lighter and thinner for more comfort.
- Compatible with Android Phones Running Android 6.0 and Above. NOT compatible with iOS.
These are manufacturer estimates, not guaranteed runtime or independent test results. Actual battery life depends on settings and use, and a used watch’s battery age and condition can reduce it.
Can you swim with the Samsung Galaxy Watch SM-R810?
Samsung states that the watch is certified to ISO 22810:2010 for a 5 ATM rating (50 m / 165 ft) under specific conditions. Samsung lists rain, showering, and shallow-water pool or ocean swimming as suitable uses. It says not to use the watch for scuba diving, water-skiing, high-velocity water, or submersion below shallow depth. The rating should not be read as approval for every water activity.
Rank #3
![Samsung Galaxy Watch 8 40mm Bluetooth Smartwatch, Cushion Design, Quick Button, Sleep Coaching, Now Bar, Running Coach, Energy Score, Graphite [US Version, Amazon Exclusive 2Yr Warranty]](https://m.media-amazon.com/images/I/41pVUmtVzHL._SL160_.jpg)
- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 2-Year Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
Software version and present-day support
Samsung’s update history records Tizen 5.5.0.2, build R810XXU1GWE2, released on May 17, 2023. Samsung notes that exact changes may differ by device model, country, and service provider. An entry in the update history does not establish that every region still receives updates or that current apps and services support the watch.
For a replacement charger or repair, use Samsung’s model-specific support routes to check accessory compatibility and replacement-part options. The support page does not establish that a particular charger SKU or part is currently available.
Quick Recap
Best Value
- BONUS BAND INCLUDED: Swap bands to match your mood or outfit; This bundle brings you (1) Galaxy Watch4 Classic 42mm smartwatch with a silver band, plus (1) bonus band in black
- BODY COMPOSITION ANALYSIS: Galaxy Watch4 Classic 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*
- BETTER SLEEP STARTS HERE: Wake up feeling refreshed and recharged with advanced sleep tracking; When you go to bed, your Galaxy Watch4 Classic 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
Rank #4
![Samsung Galaxy Watch 8 40mm Bluetooth Smartwatch, Cushion Design, Quick Button, Sleep Coaching, Now Bar, Running Coach, Energy Score, Silver [US Version, Amazon Exclusive 2Yr Warranty]](https://m.media-amazon.com/images/I/31LaWf6wVqL._SL160_.jpg)
- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 2-Year Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
