The hd 430 features a 3 button smart remote conveniently located on the cable which allows you to control music and take calls with ease and the sturdy folding design makes these headphones durable and compact enough to be taken anywhere the sennheiser hd 4 series let everyday sound great you can take it with you versatile and vibrant the new hd 4 series offers you the complete sennheiser quality package in a range of durable closed back over ear headsets that fulfill your everyday aura