Most hams will recognize the high quality and great track record of any Heil audio equipment for amateur radio.  You really should check out the reviews for this mic on eham.net.  This HM-10 is the dual cartridge model with settings #4 and #5.  According to the chart, the provided blue cable will work with Icom radios, but most smart hams should be able to rewire the wire for either Yaesu or Kenwood radios.  The condition of this mic is definitely like new; I can’t find a scratch anywhere!  I noticed just the cable selling for $65.00 canadian.  The 1/4 plug is for a wire going to a foot switch.  The mic comes in the original black case with the sheet of information and specs, etc.  I listed this before at a higher price.  This time the price will remain firm at $160.00, plus shipping.  Thanks for looking… regards… Ron  VE4SR