The new HMD 27-series invites the Broadcast Commentators and Audio Engineers to experience the highest level of wearing comfort. The top-of-the-line model is the HMDC 27, which features NoiseGard (active noise reduction) to perform well in very loud environments. By actively reducing the noise level by additional 15dB this headset increases intelligibility while at the same time protecting the user's hearing and avoiding stress and fatigue due to noise. NoiseGard does not require the usual batteries but is conveniently powered via the microphone power supply from the broadcast desk or intercom system. (Phantom powered P48). The headset is similar to the HMS 26 series equipped with the automatically opening two-piece headband, hence no pressure on the sensitive fontanelle. For those users who still prefer a conventional headband, a wide headband padding is included that converts the two-piece headband into a compact single piece. Included with the headset is the Sennheiser II-X3K1 cable. This cable features a short coil to minimize structure born noise. It is reinforced with Kevlar for durability and features a Male XLR-3 pin for the mic connector and a 1/4" TRS stereo plug for the headphones.This cable is suitable for use with the HMD26 and HMD46 Headsets.