PCI Race Radios carries a selection of microphones for your helmet. Upgrade your helmet to one of our noise cancelling microphones for the best in communication. Standard Low Gain MicrophoneThis Microphone is the standard on all helmets and headsets. Our low gain microphone was designed to work with intercom systems.Standard High Gain MicrophoneUtilized in our "Motorcycle" and "Short Course" Packages, this high gain microphone increases voice volume over hand held radios. Extreme Microphone This low gain microphone is a military spec mic ideal for extremely loud exhaust. It's a must for open window vehicles with a V8 and Satcomm users. Made in the USA. Gentex High Gain MicrophoneThis small, compact, military microphone is ideal for helmets using a hand held radio. (Short course, motorcycles) Made in the USA.Gentex Low Gain MicrophoneThis small, compact, military microphone has a low gain modification and works best with loud exhaust. Made in the USA. In Summary, here are the uses and microphones we recommend:Intercom in a UTV with stock, quiet exhaust = Standard Low Gain Mic.Intercom in a vehicle with Loud exhaust, V8, Satcomm = Extreme MicHand Held radio on a quiet bike or car = Standard High Gain MicHand Held radio in a race vehicle = Gentex High Gain MicIntercom in a vehicle with loud exhaust, V8 and those that would like smaller mic pellet = Gentex Low Gain Microphone