An electronic device includes a housing that encloses a controller and/or other electronic components, a display viewable through a face of the housing that is configured to display an alphanumeric character list, and an input device adjacent the display that is movable by a user to highlight and select respective alphanumeric characters in a displayed character list. To highlight characters within a displayed character list, the input device is rotatable about an axis that is substantially normal to the display and is slidable within a plane that is substantially orthogonal to the axis. In some embodiments, the input device is rotatable and slidable within a plane that is substantially parallel with a plane defined by the housing face. To select a highlighted character, a user depresses the input device.