Century™ SC 660 is a premium wired headset for all-day use with desk phones in busy call center or offices. Built to withstand the rigors of the toughest call center or office, they are designed for quality-conscious contact center & office professionals requiring HD voice clarity, durability & all-day comfort. Single-sided headset (SC 630) or Double-sided headset (SC 660) Easy disconnect cord to various devices (bottom cable not included*) Active Gard technology protects against acoustical shock Ultra noise cancelling microphone Adjustable headband for a personalized fit 90 degree tunable speaker housing for storage or travel