A mobile system for a user includes a telephone having one or more sensors to capture fitness data or vital sign data, the telephone having a wireless transceiver coupled to the processor to communicate fitness or vital sign data over a personal area network; and a processor coupled to the personal area network to process the fitness or vital sign data. The circuit may provide power upon user initiation and interrupt that power in response to a user command, fault state, period of inactivity and so forth. A conducive wire runs the length of the body and permits signals andor power to be transmitted though the body as the tool changes its length. The remote postage metering device then verifies the demand for authority to demand and valid funding. The detector is coupled to the receive fibers to generate electrical signals representative of the light received at the receive fibers.