JABRA Evolve 30 II UC stereo Headset 80014071 5399-829-309 Product Description: Jabra Evolve 30 II UC stereo - headset Product Type: Headset - wired - 3.5 mm jack Recommended Use: Portable electronics, 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: 10 mW Microphone: Boom Microphone Technology: Electret condenser Microphone Noise Cancelling: Yes Controls: Mute, volume, answer/end Manufacturer Warranty: 2-year warranty