Sennheiser 506249 M2AEI Momentum Around Over-Ear Stereo Audio Headphones Black New Sennheiser 506249 Momentum Around Over-Ear Stereo Audio Headphones Black IOS Closed back, over-ear model provides noise isolation and listening comfort in a compact, lightweight design Made For iPod/iPhone cable with integrated 3 button smart remote and microphone Sennheiser engineered 18-ohm transducers deliver wide frequency response and high output levels when connected to portable audio devices Foldable stainless steel headband makes it easy to pack and store so Momentum can travel with you.