Wrongduck R4S Smart Ring
Pairs well with
Size chart
How to measure your finger size?
Step 1: With a strip of paper or a thread place it between your fingers.
Step 2: Wrap it with enough tightness that it is a snug fit but not so much that it restricts your blood flow.
Step 3: Mark the lines where the thread/paper meet.
Step 4: Measure the distance between the marked lines on a scale. That's your circumference.
Step 5: Compare it the sizing chart to know your ring size.
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.
Luxury Matte Finish & Premium Comfort
Crafted with a refined matte-finished stainless steel exterior, this smart ring delivers a modern luxury look with exceptional durability. The unique frosted texture resists fingerprints while the precision center groove adds a sophisticated touch. Lightweight, smooth, and comfortable enough for all-day wear, it feels natural whether you're working, exercising, or sleeping.
24/7 Smart Health Tracking
Stay connected to your wellness throughout the day with continuous tracking of heart rate, blood oxygen (SpO₂), heart rate variability (HRV), stress levels, sleep quality, and menstrual cycle insights for women. View comprehensive wellness reports in the companion app to better understand your daily habits and overall balance.
Daily Activity & Fitness Companion
Automatically records your daily steps, calories burned, distance traveled, and multiple activity modes to help you stay motivated. Set personal goals, monitor your progress, and gain meaningful insights that support a more active lifestyle.
2–5 Day Battery Life
Designed for everyday convenience, the low-power chipset delivers up to 2–5 days of typical use on a single charge. The included magnetic charging cable makes recharging quick and effortless, so your ring is always ready for the next day.
IP68 Waterproof & Built for Everyday Life
Featuring an IP68 waterproof rating, the ring is ready for everyday situations including hand washing, workouts, rainy days, and other daily activities. The durable stainless steel construction is made to accompany your routine wherever life takes you.
Package List:
Smart Ring*1
Charging cable *1
User manual *1
View other Smart Rings
Wrongduck R4S Smart Ring
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