Teenage Engineering M-1 headphones. I'm selling these because I don't plan to use them. They are new and unopened. These are headphones from Teenage Engineering, known for their instruments, samplers, and beatboxes, and they also include a microphone. These are foldable headphones with a detachable microphone. The 1200 mm audio cable has a 3.5 mm 4-pole TRRS connector (male). Despite their compact size, by connecting the included microphone, they can be used as a headset, perfect for gaming, live streaming, recording, and more. Thank you for looking.