A wrist implant requires minimal resection of the distal radius and preserves the sigmoid notch and articulation with the head of the distal ulna. The cellular telephone includes an input device and a transmitter for transmitting signals relating to a command code entered from the input device and a unique identification code for the cellular telephone. The heat exchange elements are disposed within the housing with the first set of flow passages oriented in a first common direction in fluid communication with the first coolant inlet and outlet and the second set of flow passages oriented in a second common direction in fluid communication with the second coolant inlet and outlet of the housing.