Boston-based startup Lumia launched the Lumia 2 smart earrings on Kickstarter today; they track real-time blood flow to the head, alongside sleep, temperature, cycle awareness, and a daily readiness score. At under one gram, it’s roughly five times smaller than AirPods. That’s genuinely, impressively tiny.
The core idea is that wrist-based wearables can’t easily capture cerebral blood flow, but the ear can. The Lumia Core is a smart earring back that houses the company’s second-gen PreciseLight sensor, processors, and battery. It sits close to both the heart and brain, which Lumia says gives it cleaner physiological signals than what you’d get from a ring or watch. Clinical validation showed a Pearson r=0.91 correlation against ultrasound readings. The tech was originally built with researchers at Johns Hopkins, Duke, and Harvard to help patients with POTS and Long COVID, where blood flow irregularities tend to go undetected by standard vitals. This is the first time it’s available to general consumers.
The form factor is more considered than you’d expect. It comes as huggie hoops, cuffs, or studs in gold, silver, and clear. The SwitchBack system lets it attach to any standard push-back earring, and the cuff version doesn’t require pierced ears. Battery packs last five to eight days and swap out without removing the earring itself, so there’s no reason to take it off. The sensing core is worn on the left ear only. Earrings are sold in pairs.
But the price picture needs a closer look. The hardware runs $249. That’s before the $9.99 monthly subscription required for full access to your health data. First-year total ownership lands closer to $369, a detail Lumia doesn’t exactly lead with in its marketing. It’s also a Kickstarter, so the second-half 2026 delivery target carries the usual caveats. And the device isn’t FDA-cleared; it’s positioned as a lifestyle awareness tool, not a diagnostic one. Note: This article is based on press materials. Get This has not independently tested the Lumia 2.
Lumia 2 is live on Kickstarter now. Early access reservations are also open at lumia2.lumiahealth.com. U.S. and Canada first, with broader availability to follow.
