Bionic hands are advanced prosthetic devices designed to replace a missing or non-functioning hand. They use technology to mimic the movements and functions of a natural hand, allowing users to grasp, hold, and manipulate objects. These devices often incorporate sensors and motors to respond to muscle signals from the user's arm, enabling more natural control. Many bionic hands are equipped with features like adjustable grip strength and the ability to perform specific tasks, such as typing or holding utensils. Research in this field continues to evolve, with innovations aimed at improving functionality and comfort for users, making them more integrated into daily life.