Keyble is designed for allowing the user to authenticate itself for accessing digital and physical services in the most secure and simpler way so with is fingerprint and heartprint. At the first setup users' identity is verified by the companion app and then binded to the biometric data enrolled into the device. Keyble is the world's first wearable with embedded, fingerprint sensor for enabling an instant authentication and ECG sensors not only for health application but also for authentication (heartprint) and enabling a continuous authentication for guarantee that the user is really itself when wearing the device. Almost 2 years of work ended into this design, a research of aesthetics, components and space reduction, prototypes and production limits.