The Blackwire 3300 Series is completely plug-n-play with USB devices, so users can take calls in the office or on the go. Its robust design delivers reliability you can count on. This is the hassle-free headset you've been looking for. You wear a headset all day longbetter pick one that looks, feels, and sounds great. Boost your on-the-call confidence with professional-quality audio and a customized fit with a headset that can connect to your devices quickly and easily and is ready to go with you wherever you go. Style, comfort and audio qualityBuilt for style with a sleek design that focuses on comfort and reliability. Poly signature audio quality so you know you will sound great. And intuitive and simple features so every user can connect to their preferred device simply and easily. Performance Sound pressure level (max) 118 dB Adjustable headband Yes Signal-to-Noise Ratio (SNR) 118 dB Cable colour Red Cable length 2.179 m Control type Buttons Control unit type In-line control uni