AKG Pro Audio CM311 AESH SHURE Head-Worn Condenser Microphone Differoid noise-cancelling technology for highest ambient noise rejection Cardioid polar pattern for outstanding gain before feedback Condenser capsule with internal shock mount for efficient rejection of mechanical and body noise Robust headband construction for maximum comfort and freedom of movement Available with professional XLR/mini XLR and W/TA4F connector for all wireless pocket transmitters