Sennheiser SC30 USB ML Mono USB Headset, optimized for use with Microsoft Lync

Specification :

• Wearing style- Headband 
• Weight - 106 g / 3.71 oz
• Microphone - Noise-canceling
• Frequency response (microphone)Communication/telecommunication: 150 Hz – 6.800 Hz(Wideband)
• Speaker type - Neodynium Magnet Speaker
• Frequency response (headphones)- Multimedia: 60 Hz – 16 kHz 
• Sound pressure level (SPL) - Max. 113 dB limited by ActiveGard™ 
• Cable length - 2.1 m / 6.89 ft
• Connector - USB 
• Color - black