The Ultrasone PRO 550i headphones feature detachable cables, extra cable, speed-switch earpads incl. a spare pair of earpads, hardcase for storage and transportation and many more details meet professionals´ needs. The 50 mm heavy duty driver is producing an imposing sound intensity. Tight and powerful bass plus precise and detailed instrument placement is given. Combined with all useful accessories included in the PRO hardcase, the closed light gray PRO 550i finds its fans within bass players and drummers. Due to requests we implemented an additional function which enables you to fold these headphones easily.