Patent ID: 7101315

Claim:
A wrist exerciser comprising: a casing comprising upper and lower casing members mounted together to form a substantially spherical shape, the upper casing member defining an opening; a retention ring fixed in the casing substantially corresponding to a great circle of the sphere of the casing, diametrically opposite holes being defined in the retention ring; a rotor having opposite shafts rotatively received in the holes for rotatively supporting the rotor in the casing; at least one illumination element mounted on an outside surface of the rotor; a power source contained in the rotor; a control circuit contained in the rotor and in electrical connection with the power source and the illumination element, the control circuit selectively lighting the illumination element; and transmission means comprising: a transmitter mounted in the rotor and comprising an interface circuit connected to the control circuit and a connection member in connection with the interface circuit, and a transmission cable having opposite ends forming first and second connectors, the first connector being releasably mateable with the connection member of the transmitter of the rotor and the second connector being adapted to connect an external device for transferring an electrical signal from the external device to the control circuit.