LAST ONE, FACTORY SEALED w/Hardshell case. For SHURE wireless systems.

The AKG CM311 is a headset condenser microphone made for live touring applications.  It's the just like the original Crown and sounds like any other handheld microphone.  It's a very clear and distortion free even with very high pressure audio levels.  It uses a system called Differoid which cancels ambient noise specially from wedge monitors, live audience, and other unwanted sounds.  Most major live audio engineers agreed that their mixes are better when they can isolate unwanted audio specially on singers when they are on stage in front of wedge monitors.