What started as a playful 50th anniversary release, Casio’s Ring Watch has now snowballed into a certified hype item. The watch has since sold out repeatedly, and now even commands triple retail on the secondary market.
Now Casio is giving its tiny G-SHOCK-shaped jewelry an actual day job with the new CRW-H001 smart ring watch.
Same Face, Whole New Brain
From the outside, the CRW-H001 looks nearly identical to the original: a metal-injection-molded stainless steel body with that unmistakable square 5000-series silhouette shrunken down to cocktail-ring proportions. The magic is hiding underneath.
Casio lined the inside of the ring with ceramic to house a proper health monitoring module, complete with optical sensors pressed against your finger. That means continuous heart rate, blood oxygen, body temperature, and sleep tracking, plus daily steps, calories, and dedicated modes for walking, running, and cycling. A low-power vibration motor even buzzes for incoming calls, messages, and alarms, with everything syncing to Casio’s companion app.
The One Thing Oura Can’t Do
Every other smart ring on the market is a mute metal band that hoards your data until you check your phone. The CRW-H001 keeps a fully functional LCD on your finger: time, stopwatch, dual time, auto calendar, and an LED backlight.
And at roughly $294, it undercuts the Oura Ring 4, which starts at $349 before you’ve paid a dime of its $5.99 monthly membership. Is Casio’s sensor accuracy going to dethrone the category leader? We’re not going to pretend it will. But a functioning watch face is a legitimately clever wedge into a crowded market.
Spec Sheet
Model: Casio CRW-H001
Case Material: Stainless steel with ceramic inner lining
Dimensions: 25.3 x 19.5 x 6mm
Weight: 19g
Health Tracking: Heart rate, SpO2, body temperature, sleep, steps, calories, workout modes
Notifications: Vibration alerts for calls, messages, and alarms
Battery Life: 4-6 days (smart module), up to 25 days standby
Watch Battery: Approx. 2 years
Water Resistance: Everyday use (not swim-rated)
Sizes: 9, 10, or 11 (fixed, no spacers)
Pricing & Availability
The Casio CRW-H001 is available to order now exclusively in China, priced at ¥1,990 (~$294) across all three sizes. No word yet on a global rollout, though the original’s trajectory gives us hope.
Recap
Casio CRW-H001 Smart Ring Watch
Casio transforms its viral Ring Watch into a legitimate Oura rival, packing heart rate, SpO2, sleep tracking, and vibration alerts into a 19-gram stainless steel ring with a working digital display.
