Wrongduck SR4 Bluetooth Smart Ring – Health, Sleep & Activity Tracker
How it works
If your product is accidentally damaged within two years, Care+ includes one replacement. Claims are handled directly by Wrongduck. View plan terms.
Optional Care+. One plan per product.
Pairs well with
Size chart
WRONGDUCK SIZE GUIDE
Find your best ring size
Click Find My Size to measure online in a few simple steps. You’ll get your recommended Wrongduck ring size instantly—no chart matching needed.
Wrongduck ring size chart
Choose the store size that matches your measured diameter or circumference.
| Store size | Diameter | Circumference | ISO / EU | UK |
|---|---|---|---|---|
| 6 | 16.5 mm | 51.8 mm | 52 | L ½ |
| 7 | 17.3 mm | 54.4 mm | 54 | N ½ |
| 8 | 18.1 mm | 56.9 mm | 57 | P ½ |
| 9 | 18.9 mm | 59.5 mm | 59 | R ½ |
| 10 | 19.7 mm | 62.0 mm | 62 | T ½ |
| 11 | 20.5 mm | 64.5 mm | 65 | V ½ |
| 12 | 21.4 mm | 67.1 mm | 67 | X ½ |
| 13 | 22.2 mm | 69.7 mm | 70 | Z1 |
| 14 | 23.0 mm | 72.2 mm | 72 | Z3 |
Between sizes? Choose the larger size for a more comfortable fit. Availability varies by ring model.
Measure with paper or thread
- Wrap a narrow strip of paper or non-stretch thread around the base of your finger.
- Keep it comfortably snug without squeezing your finger.
- Mark where the two ends meet.
- Lay it flat and measure the marked length in millimetres.
- Match that circumference to the chart above.
Measure at the end of the day when your hands are at a normal temperature, and repeat the measurement twice.
Shipping Information
Before the shipping,please allow us 1-2 business days for processing your order, timing depends on the actual situation.
Once your order has been shipped, we will immediately provide you with tracking information. Delivery times vary by region, Orders typically take 4-10 days to arrive.
How much is the subscription fee?
No subscription required. With a one-time purchase, you get full access to all health tracking features.
Package List
Smart Ring*1
Charging case *1
Charging cable *1
User manual *1
Wrongduck App Download
Looking for the correct app for your Wrongduck Smart Ring? Visit our Wrongduck App Download page, select your Smart Ring model, and download the compatible app for your device.
Fashionable and Elegant Design
The SR4 smart ring perfectly combines advanced technology with modern aesthetics, using polished craftsmanship and high-quality materials to create an exquisite appearance. Compared to traditional bulky wearable devices, the SR4 is lightweight and elegant, suitable for various occasions. Whether for daily office work, social gatherings, or fitness activities, the SR4 can perfectly complement your attire, showcasing your unique taste.
Health and Sleep Tracking
The SR4 is equipped with advanced health monitoring functions that can track key health indicators such as heart rate and blood oxygen levels in real time, and provide detailed analysis of sleep quality and duration. Through this data, users can gain a deep understanding of their health status and sleep patterns, making corresponding lifestyle adjustments to optimize daily habits. The lightweight design of the SR4 ensures comfort for all-day wear, whether day or night.
Women’s Health and Fitness Support
The SR4 is designed with thoughtful health and fitness features specifically for female users, supporting menstrual cycle tracking and activity monitoring. Users can easily record and analyze their menstrual cycle, steps, exercise volume, and other data to receive personalized health advice. Whether you are focused on daily fitness or personal health, the SR4 can provide you with valuable insights to help you achieve a healthier and more vibrant lifestyle.
Data Sharing with No Extra Fees
The SR4 supports sharing health data with family or trusted contacts while ensuring user privacy and control over the data. Whether tracking personal health progress or jointly monitoring each other’s health with loved ones, this feature can enhance your health monitoring experience. Additionally, the SR4 provides full access to all features without any subscription fees, offering you an economical health management solution.
Remote Camera and Water-Resistant Design
The SR4 also features a convenient remote camera function, allowing you to easily take photos with a simple gesture without holding your phone, perfect for group photos or creative shots. Additionally, the SR4 has a water-resistant design that can withstand daily light water splashes, so you don’t have to worry about damage when washing hands, in the rain, or during exercise, ensuring durability and reliability.
Package List:
Smart Ring*1
Charging case *1
Charging cable *1
User manual *1
View other Smart Rings
Wrongduck SR4 Bluetooth Smart Ring – Health, Sleep & Activity Tracker
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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14 day return policy
We have a 14-day return policy, which means you have 14 days after receiving your item to request a return.
For details, please see: Return Policy -
Shipping Information
Processing Time:
- Before the shipping,please allow us 1-2 business days for processing your order, timing depends on the actual situation(Public Holidays/Weekends excluded)
Shipping Time（Estimate）:
- Standard Shipping Fee: $5.99 per order.
- Free Shipping: Orders over $49.99.
- Delivery times vary by destination:
- Europe: 4-9 business days
- United States: 5-8 business days
- Australia & Canada: 5-10 business days
- Other Regions: 4-12 business days
For details, please see: Shipping policy