Sleep Wearable Form Factor
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FKGZJF Gold, Size 6# (US size 6.5 approx) Smart Ring with Health and Activity Tracking
Available offers (3)
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Current
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Gold, Size 6# (US size 6.5 approx)
Retailer
€53.49
Available to order
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Price history by offer
Volatility: HighFeatures
- 24-hour heart rate monitoring
- 24-hour blood oxygen monitoring
- 24-hour HRV monitoring
- Intelligent sleep tracking
- Activity tracking with multiple sport modes
- No subscription fees
- Battery life 3-5 days
- Portable charging case 60 days total
- Magnetic USB charging
- Compatible with iOS and Android
- IP68 waterproof
General specs
- Brand: FKGZJF
- Seller: Retailer
- ID: B0GRCYQWMH
- Size: 6# (US size 6.5 approx)
- Brand: FKGZJF
- Sport Modes: Running, Cycling, Skipping rope, Walking, Hiking, Yoga, Dancing, Golf
- Battery Life: 3-5 days (ring), 60 days (with charging case)
- Subscription: No subscription fee
- Target Users: Men, Women
- Charging Time: 2 hours (ring)
- Compatibility: Android 4.4+, iOS 8.4+
- HRV Monitoring: 24-hour
- Sleep Tracking: Automatic, Deep sleep, Light sleep
- Steps Tracking: Automatic
- Calorie Tracking: Automatic
- Package Includes: Smart ring, 400mAh charging case, Magnetic USB cable, Type-C charge cable, Instruction manual
- Distance Tracking: Automatic
- Charging Case Charges: ~15 times
- Heart Rate Monitoring: 24-hour
- Charging Case Capacity: 400 mAh
- Blood Oxygen Monitoring: 24-hour
- Water Resistance Rating: IP68
- First listed by seller: April 27, 2026
If you are interested in more details, you can find full information on the seller's page.
Price History for seller Retailer
Shipping options
Delivery to 
United States
United States
Available
This FKGZJF smart ring is perfect for busy professionals and fitness enthusiasts who want to track their health without wearing a bulky watch. Use it to monitor your sleep quality and daily activity without the distraction of a screen on your wrist.
Most fitness trackers focus on step counts and heart rate, but this ring prioritizes sleep and recovery. After a long day, you can check your deep sleep and light sleep patterns in the app. The ring is so comfortable that you forget you're wearing it, yet it accurately detects when you fall asleep and wake up.
Battery life is a common pain point for wearables. This ring lasts up to 5 days on a single charge, and the portable charging case extends usage to 60 days. No more daily charging worries. The IP68 waterproof rating means you can wear it while washing hands or in the rain.
With no subscription fees, you get free lifetime access to the app. It's compatible with iPhone and Android, and the magnetic charger makes powering up easy. If you're looking for a discreet health tracker that provides heart rate, blood oxygen, and stress monitoring, this ring offers a practical solution.
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Smart Ring with Sleep Monitoring, Step Counting, Heart Rate, Blood Oxygen for iOS and Android, No Subscription Fee, IP68 Waterproof Health Tracker (Silver, 10)
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| Brand | FKGZJF | TYUIOL | Secofy | VIVIYO | DSHKISK | Free Shark |
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| Price | €53.49 | €21.39 | €49.04 | €35.67 | €35.67 | €44.58 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | May 20, 2026 | May 29, 2026 | Jun 24, 2026 | May 29, 2026 | Jun 24, 2026 | May 20, 2026 |
| Size | 6# (US size 6.5 approx) | 9 | Size 8 | 9 (US) | 10 | |
| Battery Life | 3-5 days (ring), 60 days (with charging case) | 5 to 7 days, Charging time: 1.5 hours, Includes charging case | Unspecified | Long Battery Life | 5 days, Up to 30 days with charging case | |
| Compatibility | Android 4.4+, iOS 8.4+ | Android, iOS | iOS and Android (unspecified) | iOS, Android | ||
| Sleep Tracking | Automatic, Deep sleep, Light sleep | Precision Sleep Tracking, Records deep, light, and interrupted sleep patterns, Generates daily, weekly, and monthly sleep reports | Deep sleep, Light sleep, Awake time, Daytime naps | |||
| Weight | 0.01 lbs | Lightweight (unspecified) | Not specified | |||
| Material | Lightweight | Hypoallergenic | Not specified | |||
| Dimensions | 0.55 x 0.83 x 0.1 in | 6.5mm slim profile | Not specified | |||
| Water Resistance | IP68 | Unspecified | IP68 | |||
| Health Monitoring | Heart rate, Blood oxygen (SpO2), Stress levels, Heart rate variability, Does not measure blood pressure | Heart Rate, SpO₂, HRV, Stress, Sleep Tracking, Activity Tracking, Women Health (Menstrual Cycle) | Heart Rate, SpO2, Blood Pressure, Sleep Monitoring, Heart Rate Variability | |||
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