21 CFR § 874.3305 - Wireless air-conduction hearing aid.
(a) Identification. A wireless air-conduction hearing aid is a wearable sound-amplifying device, intended to compensate for impaired hearing that incorporates wireless technology in its programming or use.
(b) Classification: Class II (special controls). The special controls for this device are:
(1) Appropriate analysis/testing should validate electro magnetic compatibility (EMC) and safety of exposure to non-ionizing radiation;
(2) Design, description, and performance data should validate wireless technology functions; and
(3) Labeling should specify appropriate instructions, warnings, and information relating to EMC and wireless technology and human exposure to non-ionizing radiation.