Sennheiser CC510 Monaural Headset Noise Canceling Mic product# S1-CC510 Over the head , monaural headset supplied with ultra noise cancelling microphone and Activegard protection technology. The CC 510 is an extremely robust monaural headset. It provides excellent sound and is very comfortable to wear. The durable construction makes it perfect for any type of office or professional communication. Key Feature ActiveGardTM safeguards the user from the effects of an acoustic burst 300 adjustable microphone boom allows the mic to be positioned exactly for optimal speech clarity. Teflon * washer support increases positioning accuracy, stability and ensure optimal durability. The headband has unique comfort pads and a specially padded ear cap, which distribute pressure and ensure remarkable comfort even during extended wearing time Just like a normal telephone, sound is received through one ear, making usage easy to get accustomed to Ultra Noise Canceling blocks out a maximum of ambient noise, making your voice easier to understand Delivery Includes: Acoustic foam ear pad Carry bag Clothing clip Colored identification clips (3) Leatherette ear pad Microphone windscreen Single sided headband with side support 2-Yr Warranty