Stereo Headset - Smartphone playback control and integrated microphone: a multi-function control button lets you manage calls and music without touching your phone, while the built-in microphone handles calls clearly. Android users can use the Smart Key app for additional control directly from your phone. - 30mm dome-type drivers with ferrite magnets: broad, dynamic frequency response with smooth treble and midrange and solid bass performance for everyday listening. - Pressure-relieving earpads and adjustable headband: swivel ear pads and an adjustable headband designed for extended wearing comfort and reduced fatigue. - Swivel and folding-style earcups: earcups rotate and fold flat for compact portability and easy storage. Use scenarios: - Daily commuting or travel: manage playback and calls hands-free, keeping your phone accessible but out of the way. - Remote work or study: clear microphone for calls and meetings; Android users can enable extra controls via the Smart Key app. - Casual listening on the go: foldable design fits easily in a bag for on-the-go listening.