Hardware startup Aina launched a smart ring priced at $399 that integrates a screen, joystick, microphone, and speaker to serve as a controller for AI agents and applications. The device enables users to take notes, send prompts to agents, set reminders, and manage calls directly from their wrist. Building on lessons from its previous Mirage controller, Aina positions the ring as an interface designed for users managing multiple digital devices and AI applications, with pre-orders beginning at early-bird pricing and shipments expected in January 2027.