The system utilizes in-ear PPG and motion sensors to track heart rate, sleep position, and movement, while a companion charging case monitors ambient light, temperature, and noise levels. An onboard AI agent interprets these data points to trigger interventions, such as adjusting active noise cancellation (ANC) if a partner begins snoring or traffic noise surges. Users can transition from streaming podcasts to locally stored sleep audio without manual input, as the earbuds shift configurations once the system detects the onset of sleep.

Designed for comfort, each earbud weighs 3.3 grams and features a 9.9 mm profile intended to remain unobtrusive for side-sleepers. The hardware offers up to 16 hours of battery life and includes a private, offline alarm that awakens only the wearer. Fitnexa emphasizes a privacy-first approach, stating that the device does not store ambient audio or record conversations. Priced at $349.99, DUVA ONE is scheduled for an October 2026 release across the United States, Canada, the United Kingdom, the European Union, and Australia.