Over the head, monoaural headset supplied with noise cancelling microphone and Activegard protection technology. Features: - The SH 330 is a lightweight, all purpose monaural headset ideal for longer conversations. It is the stylish and highquality solution for users who value great comfort and top speech quality in any professional situation. - ActiveGardTM safeguards the user from the effects of an acoustic burst - Self-adjusting ball-mounted speaker capsule allows perfect fitting to the head - 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. - Special acoustic foam ear pad optimizes sound penetration around the center of the cushion and into the ear canal while minimizing leakage. The sound remains - Superb whether using the leatherette or foam ear pad.