The stainless steel wearable features a working LCD screen, a ceramic inner lining, and integrated health sensors that track heart rate, blood oxygen, sleep, and body temperature while syncing with a companion app.
For years, technology consumers faced a stark aesthetic trade-off. Choosing a smartwatch meant strapping a bulky piece of digital hardware to your wrist, sacrificing traditional fashion for health tracking metrics. Smart rings eventually entered the market to bridge that gap, offering a more discreet profile. Now, Casio is pushing that concept further by combining its retro watch designs with modern health monitoring technology, creating a hybrid device that blurs the line between a novelty fashion accessory and a serious fitness tracker.
Design and Hardware: Stainless Steel Meets a Ceramic Interior
The new device follows in the footsteps of Casio’s earlier viral ring watches, which captured attention by shrinking a classic digital timepiece down to finger size. The Gizmodo retains the iconic aesthetic of a miniature digital watch, featuring a fully functional LCD screen capable of displaying the time alongside a tiny stopwatch and alarm.
Accommodating internal electronics required several structural adjustments compared to older, non-smart iterations. While the exterior maintains a durable stainless steel finish, the inside of the ring now features a ceramic lining designed to house the health monitoring module. These modifications add a bit of heft, bringing the device weight to 19 grams.
Furthermore, sizing has been overhauled. Instead of relying on manual spacers to adjust fit, the ring comes in three distinct sizes: small, medium, and large.
Health Tracking and Smart Features Added to the Display
The upgrade goes far beyond mere appearance. The integrated sensor suite can track heart rate, blood oxygen levels, sleep and body temperature. Beyond vital signs, the wearable also counts steps, estimates calorie burn, and records workouts for running, walking, and cycling.

Notifications are handled through a built-in vibration motor, alerting users to incoming messages or sounding alarms directly from the finger. All collected metrics sync seamlessly with Casio’s companion application.
Pricing and Battery Life Compared to Industry Competitors
The CRW-H001 is available to order now in China for ¥1,990, which converts to roughly $294 inclusive of local taxes.
Battery performance remains constrained by the device’s miniature physical footprint. The ring delivers approximately four to six days of battery life on a single charge, or up to 25 days in standby mode. Casio estimates the overall operational lifespan of the internal battery to be around two years before a replacement is required.
Global Availability Rains Unconfirmed
Casio has not confirmed whether the CRW-H001M-8 will expand beyond mainland China. However, given the widespread viral success of the brand’s earlier non-smart ring watches, tech enthusiasts and accessory fans are anticipating an eventual international release.
Worth a look