Yaesu MH-73A4B waterproof speaker microphone is just as rugged and durable as the radios it was designed for. This mic meets IPX7 specifications for submergibility for up to 30 minutes at 3 feet and has a rated output of 0.5 watts. This mic comes equipped with a rotating clip installed on the back. The MH-73A4B is a great match for the VX-7R, VX-6R, VX-170, VX-177, FT-270R, or the FT-277R! This model replaces the CMP460A.