Haptic Feedback

A Haptic Feedback is a technology that uses tactile sensations, like vibrations or pulses, to communicate information to users. In cryptocurrency hardware wallets, it confirms actions such as button presses or transaction approvals through physical device responses, independent of visual displays.

Hardware wallets employ small motors, such as eccentric rotating mass (ERM) or linear resonant actuators (LRA), embedded in the device. Firmware triggers these actuators upon detecting events. For example, a short double vibration signals a successful transaction signature, while a prolonged buzz indicates an error. Patterns vary in intensity, duration, and rhythm for clear distinction.

Haptic feedback enhances security in crypto environments. Users verify actions without relying on potentially compromised screens, reducing phishing risks. It supports blind operation, vital for air-gapped wallets, and aids visually impaired users. In bright light or noisy areas, it ensures reliable confirmations.

Key characteristics include customizable patterns, adjustable intensity levels, and energy efficiency. Types range from simple binary vibrations to complex sequences resembling Morse code. Synonyms: vibration feedback, tactile feedback.