Ever wondered why some radios provide audio that is just too difficult to decipher? It comes down to ambient noise in and around your boat. Winds, waves, hull slap and motor noise all combine to muddle your voice transmission. Always inquire as to the sound cancelling, or noise cancelling technology in the radio you select. We use Icom handhelds in our photo cover shoots because their noise cancelling tech is so defined, we can communicate from chopper to skipper using Icom handhelds. That same tech is in the M510.