The MK-III offers unprecedented performance at an affordable price! Designed for Commercial, Military and Professional divers, the MK-III has the ability to communicate with 3 divers simultaneously in loud, hard working conditions due to it’s powerful speaker. The panel displays a 3 diver color coded section to allow a surface tender to quickly identify and adjust volumes on the fly. The connector panels have the ability to be switched as needed, quickly and easily. Download Safety Bulletin Download User Manual