Q: Do I have to pay any recurring fees to use the tracking features of the SARUNN ER Smart Ring?

A: No. The SARUNN ER Smart Ring requires **no subscription fee**, giving you lifetime access to all health monitoring features in the app.

Q: How long does the battery last on the SARUNN ER Smart Ring after a full charge?

A: The SARUNN ER Smart Ring offers up to **5 days of use on a single charge** and **over 30 days** when paired with the smart charging case.

Q: What health data does the SARUNN ER Fitness Ring continuously track throughout the day?

A: It continuously monitors key health data such as **heart rate** and **blood oxygen levels** 24 hours a day.

Q: Is the SARUNN ER Smart Ring compatible with both Apple and Android phones?

A: Yes. It is fully compatible with both **iOS (iPhone)** and **Android** devices, ensuring easy connectivity for all users.

Q: How deep is the SARUNN ER Smart Ring's waterproof rating, and can I wear it swimming?

A: The ring features **IP68 waterproof protection** with a depth rating of up to **80 meters**, making it safe for swimming and intense workouts.

Q: How does the SARUNN ER Smart Ring help me monitor my sleep quality?

A: It accurately tracks **deep sleep, light sleep, and wake times**, providing detailed insights in the app to help improve your sleep quality.

Q: What should I do before ordering the SARUNN ER Smart Ring to ensure it fits?

A: It’s recommended to **check the size chart and measure your finger carefully** before purchasing to ensure a comfortable and secure fit.