Featuring an extremely durable construction and a folding headband for easy storage when not in use, the HD 4.20s is perfect for listening to music and taking calls on the go. The convenient 1-button smart remote on the cable allows controlling portable device. Take your music with you, anywhere. Versatile and vibrant, the new HD 4 series comprises the complete Sennheiser quality package in a range of durable, closed-back, over-ear headsets that redefine the quality of sound. This robust but elegant over-ear headset is the right choice for all listeners going for immaculate sound, comprehensive features, and the looks to match.