If you can’t stand fitness-tracking bands or smartwatches, maybe you should put a ring on it.

Not just any old ring, obviously—a waterproof, Bluetooth, titanium activity-tracking ring with a built-in accelerometer, LED lighting, and an optical heart rate sensor just like you would find in any top-of-the-line fitness band. It’s called Motiv, and it might just be the most subtle activity tracker on the market.

The $200 ring, which was announced this week at CES and starts shipping in early March, aims to make fitness-tracking totally unobtrusive. You can wear the low-profile, 8mm ring constantly—to bed, in the pool, while showering—just like a wedding band, although it needs to be charged every five days.

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