Abstract: A hand-worn data-input device is provided. The hand-worn data-input device is wearable on a hand, for entering data-inputs into electronic/computing devices by reading and interpreting, via electromagnetic sensing, static/dynamic user-inputted gestures between digits, other portions of the hand and other hand-worn components of the data-input device, relative to each other, wherein sensing units are configured to be placed at/by specific spots/regions of the hand and comprise fixation, insulating and/or electromagnetic shielding means, and wherein the hand-worn data-input device comprises at least one energy unit, at least one thumb-worn sensing unit, at least one body-contact sensing unit, at least one signals/data connection unit and at least one data-inputs connection unit, and wherein when fingertip sensing units are worn, the fingertip sensing units are uniquely identified and simultaneous multi-channeled electromagnetic coupling between the fingertip sensing units and other sensing units is enabled.