User's Manual

Safety & Precaution 28
M rating is M3, the T rating is T3.
M-Ratings: Phones rated M3 or M4 meet FCC requirements and
are likely to generate less interference to hearing devices than
phones that are not rated. M4 is the better/higher of the two
ratings. Your device is rated M3.
T-Ratings: Phones rated T3 or T4 meet FCC requirements and
are likely to be more usable with a hearing aid’s telecoil than
phones that are not rated. T4 is the better/higher of the two
ratings. Your device is rated T3 .