Have tested numerous microphones, rk56, astatic 636L, astatic road devil, sr-198, but this is the best bang for the buck. No batteries required and microphone audio sounds amazing. I run these microphones on my base and my mobile in my F-750 service truck. As long as your background noise isn’t crazy loud, you’ll have no complaints on your audio. The closest clarity I’ve tested is with the astatic road devil, but don’t have to worry about a battery or a mic gain slider. Well worth the money. I own 4 of these mics and there is no difference in audio on any of them. I highly recommend these mics. If any doubt look up these mic reviews on roosters CB YouTube channel. You won’t be disappointed!!!