Sennheiser 504554 Monaural Uc Headset W Call Control

Sennheiser HD voice clarity ? wideband sound for a natural listening experienceUltra noise-cancelling microphone for perfect speech transmissionSound-enhancement profiles ? perfect for communication and musicHigh-quality neodymium speaker for outstanding HD audio qualityActiveGard? technology protects users against acoustic injury caused by sudden sound burst on the lineStainless steel hinge on speaker joint formaximum strengthBrushed aluminum parts for strong and lightweight designUnibody headband construction for maximum strength at stress pointsVectran?* reinforced cable for extreme durabilityLarge leatherette earpad for exceptional wearing comfort and powerful soundUltra sonic welded microphone housing for maximum durabilityExtension headband with number indications for accurate adjustment90 degree turnable speaker-housing for space saving storage and transportUltra sonic welded ergonomic call control unit is strong and compactUnique magnetic holder for one-touch use of call control unitCall control unit allows for easy answer/end a call, volume up/ down, microphone mute and redial last outgoing call