Ultra-miniature omnidirectional condenser lavalier mic, featuring excellent transient performance and extended frequency response. The COS-11D, which overcomes RFI (radio frequency interference) from digital transmitters. In today’s wireless transmission systems the microphone must remain unaffected by new forms of digital transmitter signals. In many cases, noise levels increase and the S/N ratio is deteriorated by the interference of digital transmitters. Available in four colours (Black, Gray, Beige & White).