
Lumia has launched Lumia 2, smart earrings that track real-time blood flow to the head, and raised $7 million in funding from J2 Ventures, BonAngels Venture Partners, and angel investors. The company has also secured $5.1 million in government contracts and grants, bringing total funding to $17.2 million.
The earrings can be worn as huggie hoops, cuffs, and studs in gold, silver, and clear finishes. The device weighs less than 1 gram and attaches to any push-back earring using SwitchBack technology. The cuff does not require a pierced ear.
Lumia 2 includes sleep, temperature, menstrual cycle, and readiness tracking in addition to blood flow monitoring. The device was originally developed with Johns Hopkins, Duke, and Harvard researchers to help patients with chronic blood flow disorders including POTS and Long COVID-19.


“This is what comes after smart rings,” said Daniel Lee, co-founder and CEO of Lumia. “Just as Oura made rings smart, we’ve made earrings smart. Smart Earrings are the ultimate wearable form factor with new capabilities possible only in the ear.”
The Lumia Core smart earring back houses the PreciseLight sensor, processors, battery, and health sensors. The device captures health signals that cannot be measured at the wrist or finger due to its location near the heart and brain. Each battery pack supports 5 to 8 days of battery life.
Lumia’s blood flow tracking has been clinically demonstrated at Johns Hopkins, Duke, and Harvard, with research published in the Journal of the American Heart Association and the Journal of the American College of Cardiology.
Blood flow changes with hydration, diet, posture, movement, and sleep. Lumia tracks these changes throughout the day to show how lifestyle factors affect energy, focus, and mental clarity.
Lumia 2 will be available in the United States and Canada, with support for iOS and Android. The device is not FDA-cleared and is not intended to diagnose, treat, or prevent disease. The company was founded in 2020 by former Bose engineers and is based in Boston. The company has a 35-person team and holds 11 granted or pending patents.