There is no shortage of ways to track your health nowadays. You’ve got rings , earbuds , phones, wristbands , watches , and this thing that scans your pee , just to name a few. Crowded though the field may be, there’s always room for one more wearable. Just a small health-optimizing gadget as a treat—no, seriously, like, really small.

The Lumia 2 , a $250 smart earring that’s officially launching today, claims to be the world’s smallest wearable. With a weight of just 1g, Lumia might actually be correct in planting that very tiny flag. It makes the 3g to 5g Oura Ring look big, and the 30g to 40g Apple Watch Series 11 look absolutely massive.

Don’t be deceived, though; the size of the Lumia 2 betrays a pretty large feature set. According to Lumia, its smart earring can

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