Answer/end calls, control volume, redial and reject incoming call directly from headset, Microphone always stays in the best position, Patented Sennheiser ActiveGard® hearing protection technology protects users from the potential danger of acoustic shock., With large, comfortable ear pads and solid construction, you’ll be surprised at how light these headsets feel. It’s the perfect balance between comfort and durability for the office professional., With the bendable boom arm, your microphone always stays in the best position. It simply cannot be twisted out of place. Wear it on the right. Wear it on the left. It’s up to you. The boom arm rotates but always stays perfectly placed.