Thank you for viewing. Adjustable microphone headset with a 2-year warranty. New Logitech Headset Stereo 3.5mm connection Compatible with Windows and Mac ・Frequency Response: [Microphone] 100Hz-16kHz, [Headphone] 20Hz-20kHz 3.5mm audio jack, not USB type. ・[Stereo sound 3.5mm audio jack headset] This headset provides clear audio for business use such as video calls and conferences, as well as for music and games. ・[Multi-OS Support] Compatible with Windows, MacOS, and ChromeOS. Can be used with smartphones and tablets. Noise canceling function: Supported, Warranty period: 2 years ・[Adjustable headband for comfortable fit] The durable and lightweight headband can be adjusted to fit individual sizes, providing long-lasting comfort. ・[Noise-canceling microphone is rotatable] Equipped with a noise-canceling microphone, the boom rotates 180°, allowing it to be worn on the left or right side. When the microphone is not needed, the boom can be rotated and set in a position that does not get in the way. Works with common calling applications on almost all platforms and operating systems. Although it is new and has not been opened, please ask questions beforehand if you are concerned.