** After successfully placing an order and making the payment, we will send a ring sample set (Size Kit) to you in advance for you to try on and determine the ring size. Please try it on for one day to decide on the ring size. Once you have decided, please email newstarclub@newstarltd.com.hk to contact our customer service, providing your order number and the ring size you would like to purchase.
The JCRing ring sizing kit is the ideal tool for finding the perfect ring size, allowing you to easily measure your finger size and ensure you find the ideal fit for optimal comfort before purchasing a JCRing Smart Health Ring.
Real-time Tracking - Record oxygen levels & heart rate every second continuously Audio Reminder - Audio reminder for low blood oxygen in mobile APP & device. Adjustable alarm volume & threshold Comfortable & Wearable - Easily wear on one finger. Convenience for everyday use Free iOS/Android APP - Connect device to APP via Bluetooth 4.0. Analysis and trends of oxygen saturation & heart rate Rechargeable - Built-in rechargeable battery with approx. 14 hours battery life IP22 For kids 3-10 years old*