A device is disclosed that includes an external unit configured to communicate with an implant unit beneath the skin of a subject and an indicator associated with the external unit. The indicator is configured to produce an indicator signal when the external unit is within a predetermined range of the implant unit. In addition, the indicator may be configured to vary the indicator signal according to a distance between the external unit and the implant unit. Furthermore, a method of locating an external unit with respect to an implant unit is disclosed that includes detecting a distance between the external unit and the implanted unit located beneath the skin of a subject, producing an indicator signal when the external unit is within a predetermined range of the implant unit, and varying the indicator signal as a function of a distance between the external unit and the implant unit.
