A mouse (1) suitable for use as a computer input device that is collapsible between a flat configuration in which the mouse (1) is generally planar, and an optional popped configuration in which the mouse (1) has increased volume and forms a generally curved ergonomic profile, where said mouse (1) can be used for wireless data input and control and is operable in either configuration, and can be conveniently attached when flat with a docking cradle or tray (3) that slides into a card-shaped recess (13), such as a PCMCIA or CardBus interface slot within a host device (12) for the purposes of storage, battery recharging, and where said docking cradle (3) can directly provide wireless connectivity and control information between the mouse (1) and host device (12). The mouse (1) may support a combination of buttons (4) and capacitance panels (41) for increased control.