A user operable device for control of or communication with an electric appliance, in particular a user operable pointing device such as a mouse, including electrical components and circuits including sensor elements, processing elements and wireless communication elements for detecting movements including at least rotational movements of the device, producing data related to the movements and transmitting the data to the electric appliance, is characterised in that the device (1) is essentially a ball (2) including outer surface (2′) for free rolling and for receiving influences of physical effects on the surface and the device, and that the electrical components and circuits (3, 4, 5, 6, 7, 8, 9, 10) are inside the ball (2) in integrated relationship with the ball. The invention concerns also a user interface including the user operable device of the invention.