Yep, agree 110% 9C1Driver, way easier to install the RF Limited 2018 extreme mic as well LOL! Plug and play as they say. Already wired for cobra style 4 pin mics. And yes they do everything an echo board will do, a lot more then some echo boards as a matter of fact. They also make a great power and noise cancelling mic as well when the echo is turned down al the way. Great mics for what they are!! I love mine just for the fact it can be used as just a good power mic and also has a NR (Noise Reduciton), feature built in that can be turned on/off. This along with the plethora of other things it does!! Much better option then butchering the inside of the radio!! And when you want to sell the radio, you don't have to remove anything but the mic and carry it along to the next radio! Also know this. The VR pots to turn down/ up things are located at the back of the mic and can be accessed with a small screwdriver. All that is required is a 9 volt battery!! Good luck with whatever you decide. But mt vote goes to the RF limited 2018 extreme. JMHO's.
Have a great day.
73 and God Bless from
222 Daytona Beach, FL.