JABRA Evolve 40 MS stereo Headset on-ear 80014071 6399-823-189 Product Description: Jabra Evolve 40 MS stereo - headset Product Type: Headset - wired Recommended Use: Phone, computer 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 Controls: Mute, volume, answer/end Manufacturer Warranty: 2-year warranty