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title: J-style X7 Ring
---

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# **J-style X7 Ring** **with CALERA® Technology**

## Product Info

In November 2025, we announced an exciting partnership with **J-style** to launch a precision **core body temperature monitoring ring** powered by **greenteg’s CALERA® technology**. Blending sleek design with advanced sensors and AI, the non-invasive JC Ring enables continuous, day-and-night core temperature tracking in a lightweight, comfortable form.

This collaboration represents the next generation of wearable health insights, delivering accurate core temperature measurement during daily activities, sleep, and exercise.

**Available for order in 2026. For more details, please download the specification sheet.**

![J-style ring](https://info.greenteg.com/hs-fs/hubfs/J-style%20ring.png?width=500&height=750&name=J-style%20ring.png "J-style ring")

 Download the Specification Sheet

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