LENOVO WIRED VOIP STEREO HEADSET 80008028 4XD0S92991 Product Description: Lenovo Pro Wired Stereo VOIP Headset - headset Product Type: Headset - wired Recommended Use: Phone, computer Colour: Black Headphones Form Factor: On-ear Connectivity Technology: Wired Sound Output Mode: Stereo Audio Specifications: Frequency Response 150 - 7000 Hz Impedance: 32 Ohm Microphone: Boom Microphone Technology: Electret condenser Controls: Mute, volume, answer/end Manufacturer Warranty: 1-year warranty