JABRA EVOLVE 20 MS Stereo USB Headband 80014071 4999-823-109 Product Description: Jabra Evolve 20 MS stereo - headset Product Type: Headset - wired - USB Recommended Use: Computer - communication Headphones Form Factor: On-ear Connectivity Technology: Wired Sound Output Mode: Stereo Sound Effects: Crystal Clear Audio Specifications: Frequency Response 150 - 7000 Hz - Sensitivity 93.6 dB Impedance: 32 Ohm Max Input Power: 5 mW Microphone: Boom Microphone Technology: Electret condenser Controls: Mute, volume, answer/end Software Certification: Certified for Skype for Business Manufacturer Warranty: 2-year warranty