Sennheiser MOMENTUM 4 Wireless Over-Ear Noise Cancelling Headphones - Copper Special EditionSennheiser's MOMENTUM range sets the standard for sophisticated listening with superior sound. The new MOMENTUM 4 Wireless once again raises the bar delivering best in class sound quality with advanced Adaptive Noise Cancellation and exceptional comfort. Listen your way thanks to features including Transparency Mode, Built in EQ, and a new Sound Personalization feature. Calls also sound more natural thanks to an advanced digital beamforming microphone