The SC 630 Monaural Professional Headset from Sennheiser is a single-sided headset designed for use in call centers and offices. This headset features a noise-cancelling microphone designed to filter out ambient noise, and HD voice clarity. The metal-reinforced headband maintains a perfect fit and is numbered for easy accurate adjustment. The ActiveGard technology is designed to protect you from acoustic shock and sudden sound surges. This professional headset is constructed of stainless steel and brushed aluminum parted, with a durable unibody headband. It comes included with a large leatherette ear pad for wearing comfort and better sound, and a cable clip is mounted on the headset.