Circle™ SC 238 and SC 268 are wired headsets optimized for high impedance/narrowband desk phones. Designed for contact center and office professionals requiring outstanding sound performance, durability and all day wearing comfort. Variants Choosing the right Circle™ Monaural headset - Hear what's going on around you A single-sided wired headset for users in busy contact centers and offices, who require outstanding sound performance while maintaining contact with their surroundings. Binaural headset - Stereo sound for maximum focus A double-sided wired headset for users in busy contact centers and offices, who require outstanding sound performance in noisy environments. Voice Clarity Speech intelligibility in noisy environments Sennheiser Voice Clarity and a noise-cancelling microphone optimize speech intelligibility in noisy environments. Features leatherette ear pads and Sennheiser ActiveGard® acoustic shock protection. Designed for contact center and office professionals requiring outstanding sound performance, durability and all day wearing comfort. All day comfort Designed for all day use, the CircleFlex™ dual-hinge ear cup with soft leatherette ear pads provides long-lasting comfort. Easy Disconnect Sennheiser's Easy Disconnect plugs are ideal for contact centers and hot desking offices, where users frequently change shifts or switch between workstations. ActiveGard® ActiveGard® technology protects users from the potential danger of acoustic shock of unexpected and extremely loud sounds on the line. Build to last Its durable construction with lightweight, metal reinforced headband is designed for years of continuous use. Sennheiser Voice Clarity If you are working in a noisy enovironment, you will benefit from the Voice Clarity technology in Sennheiser headsets. With a noise-cancelling microphone and detailed sound, every word comes through crisp and clear. It's as if you're having a face-to-face conversation.