Icom Microphone f/M506 Front Connector Speaker. The Icom Speaker Microphone IC-M506 is a waterproof speaker microphone that is built to last as long as you do so you don't need to worry about damage caused by water or humidity. This Icom Microphone is extremely easy to install and use. An R2M connector makes it easy to install in a jack mounting box. Discover the full line of Icom connectors along with accessories including mounts adapters and more. Specifications for Icom Speaker Microphone f/M506 Front Connector: Manufacturer: Icom Color: Black Package Contents: Icom Speaker Microphone f/M506 Front Connector Icom HM205B: Microphone f/M506 Front Connector Speaker