Boom mic length (mm): 130 mm, Impedance: 32 ohms, Button user controls: Call answer/ignore/end/hold; Redial; Mute; Volume +/-, Boom mic rotation: 270°, Ear cushions: Artificial leather, Compatible Operating Systems: Windows 11; Windows 10; macOS, Speaker size: 28 mm, Warranty: 02 Years, 80S04A6.