The 3M PELTOR Flexible Boom Speech Microphone, MT33/1, is for use on the 3M PELTOR Protective Communication Headsets that accept a dynamic speech microphone. The MT33/1 speech microphone is noise-canceling and resistant to wind noise. With an IP68 rating, the MT33/1 speech microphone is water and dust proof for reliable performance in demanding conditions.The 3M PELTOR Brand is a respected global leader in hearing protection and communication solutions. With production facilities in several countries including the US, 3M PELTOR supplies innovative solutions to numerous industries worldwide including elite tactical military teams and law enforcement agencies. The PELTOR brand is built tough for the working professional.