Sense FB521BKGB-US Advanced Health Smartwatch: Heart health monitoring tools
For the active American who wants to stay on top of their health without constant phone checks, the Sense Advanced Health smartwatch is your daily wellness partner. While many focus on fitness tracking, this watch offers a unique angle: it helps you manage stress and understand your body’s signals for a balanced lifestyle. The all-day stress detection gives you a real-time score, so you can take a breath when needed—no more guessing how your day is affecting you.
With features like the ECG app and skin temperature trends, you get insights that feel personal. For example, the irregular heart rhythm notification might alert you before you even feel off, giving you peace of mind during workouts. It syncs seamlessly with Alexa for hands-free updates and tracks everything from sleep stages to blood oxygen, making it easy to see your progress over time. Stay connected with on-wrist calls and notifications, all in a slim design that lasts up to 6 days on a single charge.
Features
- Stress management score
- Skin temperature tracking
- ECG app for heart rhythm
- 40+ exercise modes
- 6+ day battery life
- Heart health monitoring tools
General specs
- Brand: Sense
- Model: FB521BKGB-US
- Seller: Joom
- ID: 687f5c63696e9b0133d9dfe8
- GPS: Built-in
- Weight: 52
- Storage: 32
- Battery Life: 10
- Connectivity: Bluetooth, Wi-Fi
- Display Size: 1.43
- Display Type: AMOLED
- Sports Modes: 150
- Standby Time: 30
- Band Material: Silicone
- Case Material: Stainless Steel
- Health Sensors: Heart Rate, SpO2, ECG, Temperature
- Battery Capacity: 305
- OS Compatibility: Android, iOS
- Water Resistance: IP68
- Bluetooth Version: 5.0
- First listed by seller: 11/15/25
If you are interested in more details, you can find full information on the seller's page.
Price History for seller Joom
| Date | Price |
|---|---|
| 12/6/25 | $328.45 |
| 11/15/25 | $331.86 |
Shipping options
United States
Video Reviews
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Sense FB521BKGB-US Black Heart health monitoring tools
|
Blackview R1 Black IP68 waterproof up to 65 feet
|
Fitpolo IDW208P Rose Pink Alexa built-in for voice control
|
Google GA05773-US Black Heart rate tracking
|
Senbono IDW25 Purple Alexa voice assistant built-in
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MFVLP LC210 Black Bluetooth calling and message notifications
|
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| Brand | Sense | Blackview | Fitpolo | Senbono | MFVLP | |
| Model | FB521BKGB-US | R1 | IDW208P | GA05773-US | IDW25 | LC210 |
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| Price | $328.45 | $29.99 | $50.69 | $279.99 | $29.99 | $18.99 |
| Seller | Joom | Blackview | Amazon | Amazon | Amazon | Amazon |
| Update | December 6, 2025 | April 18, 2025 | December 6, 2025 | December 6, 2025 | July 20, 2025 | December 6, 2025 |
| GPS | Built-in | None | None | None | ||
| Weight | 52 | 86.18 | 2.51 | 43.5 | ||
| Storage | 32 | Not specified | ||||
| Battery Life | 10 | 7 | 1 | 7 | ||
| Connectivity | Bluetooth, Wi-Fi | Bluetooth | 4G | Bluetooth | Bluetooth | |
| Display Size | 1.43 | 1.8 | 1.77 | 1.83 | 1.85 | |
| Display Type | AMOLED | AMOLED | HD | AMOLED | AMOLED | |
| Sports Modes | 150 | 20 | 110 | 120 | 100 | |
| Standby Time | 30 | 30 | ||||
| Band Material | Silicone | Silicone | Silicone | Silicone | ||
| Case Material | Stainless Steel | TPU | Not specified | Aluminum | ||
| Health Sensors | Heart Rate, SpO2, ECG, Temperature | Heart Rate, SpO2, Temperature | Heart Rate, SpO2 | Heart Rate | Heart Rate, Blood Pressure, SpO2 | |
| Battery Capacity | 305 | Not specified | ||||
| OS Compatibility | Android, iOS | Android, iOS | Android | Android, iOS | Android, iOS | |
| Water Resistance | IP68 | IP68 | IP68 | IP68 | IP68 | |
| Bluetooth Version | 5.0 | 5.3 | 5.0 | 5.3 | ||
