The original microphone in my 52 year old Bonanza was not working correctly so I searched on line for a replacement. I selected the Telex 38t because it reminded me of the mikes I used flying Boeing 757s for Eastern Airlines. It works fine and now I get a Ã¢??loud and clearÃ¢?Â response from the tower. The only reason I didnÃ¢??t give it 5 stars is because it did not come with a mounting bracket.