Samsung Watch 4 40mm R865 Galaxy Watch 4 40mm Smartwatch: ECG monitor for heart health
But wait, there's more (no infomercial voiceover, promise):
- It's like having a personal trainer and sleep guru rolled into one, with health and fitness tracking plus sleep cycle monitoring.
- Opt for the cellular LTE model, and you can leave your phone at home (finally, some freedom!).
- And here's the kicker—it's in renewed condition. That means all the awesome without the ouch on your wallet.
General specs
- Brand: Samsung
- Model: Watch 4 40mm R865
- Seller: Amazon
- Connectivity: Bluetooth, WiFi, LTE
- Compatibility: Android devices
- Special Features: ECG Monitor, GPS, Fall Detection, Samsung Pay
- Network Bands: B2 (1900 MHz), B4 (1700 MHz), B5 (850 MHz), B12 (700 MHz), B13 (700 MHz), B25 (1900 MHz), B26 (850 MHz), B66 (1700 MHz), B71 (600 MHz)
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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$52.30
Last price update: 6/4/25
Available to order
Shipping options
Delivery to 
United States
United States
Available
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Samsung Watch 4 40mm R865 ECG monitor for heart health
|
Samsung Watch5 40mm GPS Only Advanced Sleep Coaching
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Samsung Watch 5 40mm Advanced sleep coaching
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Samsung SM-R845U Advanced health monitoring
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Samsung SM-R861NZSAXAA Fitness tracking with performance insights
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Smartwatch with GPS and Wireless Charging NFC support
|
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| Brand | Samsung | Samsung | Samsung | Samsung | Samsung | SCIONE |
| Model | Watch 4 40mm R865 | Watch5 40mm GPS Only | Watch 5 40mm | SM-R845U | SM-R861NZSAXAA | |
| Color | ||||||
| Rating |
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| Price | $52.30 | $88.99 | $74.62 | $45.00 | $159.99 | $78.02 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Joom |
| Update | June 4, 2025 | June 27, 2025 | July 17, 2025 | July 17, 2025 | June 27, 2025 | July 30, 2025 |
| item_weight | 1 ounces | 5 ounces | 5.9 ounces | |||
| standing_screen_display_size | 1.4 Inches | 34.5 Millimeters | 40 Millimeters | |||
Galaxy Watch 4 40mm Smartwatch
$52.30
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