JABRA Evolve 30 II MS Mono Headset 80014071 5393-823-309 Product Description: Jabra Evolve 30 II MS Mono - headset Product Type: Headset - wired - USB, 3.5 mm jack Recommended Use: Portable electronics, phone, conference - communication Additional Functions: DSP Headphones Form Factor: On-ear Connectivity Technology: Wired Sound Output Mode: Mono Sound Effects: Crystal Clear Audio Specifications: Frequency Response 150 - 7000 Hz - Sensitivity 93.6 dB Impedance: 32 Ohm Max Input Power: 10 mW Microphone: Boom Microphone Technology: Electret condenser Controls: Mute, volume, answer/end Software Certification: Certified for Skype for Business Manufacturer Warranty: 2-year warranty