47 CFR § 2.801 - Radiofrequency device defined.
As used in this part, a radiofrequency device is any device which in its operation is capable of emitting radiofrequency energy by radiation, conduction, or other means. Radiofrequency devices include, but are not limited to:
(a) The various types of radio communication transmitting devices described throughout this chapter.
(b) The incidental, unintentional and intentional radiators defined in part 15 of this chapter.
(c) The industrial, scientific, and medical equipment described in part 18 of this chapter.
(d) Any part or component thereof which in use emits radiofrequency energy by radiation, conduction, or other means.