Designed with Skype in mind: for professionals using Skype for business, who require a consistently excellent hands-free communication solution Hd sound: powered by Sennheiser HD stereo sound to ensure a clearer and more natural meeting and entertainment experience Easy disconnect: simple, quick release mechanism made to withstand the repetitive plugging and unplugging of shift changes Noise-cancelling technology: filters out all unwanted background noise for crystal-clear conversations on calls State-of-the-art materials: stainless steel hinges, Brushed aluminum parts, & Vectran reinforced cables defend your headset against everyday use In-line call control unit: answer or end your calls, control the volume, mute your mic and redial calls - all directly from your headset