MICROPHONE WORKS GOOD, I DID TEST IT ON A KENWOOD AND IT DOES WORK FINE. I DID PUT BATTERIES IN THE MIC TO TEST IT AND SEE THAT IT WORKS GOOD AND LOUD, THEN I REMOVED THE BATTERIES. WORKS WITH BATTERIES OR NOT JUST MORE POWER AND LOUDER IF YOU HAVE BATTERIES. BATTERY COMPARTMENT IS CLEAN. SHELF -BX