Adjustable and foldable, these comfortable on-ear headphones feature rotating earpieces, so you can wear them around your neck when not using them. Enjoy crisp and clear sound quality when you listen to music and podcasts or watch videos, and the built-in microphone facilitates easy calling, with clear sound at both ends of the call. Pair the headphones once with your device (phone, tablet or laptop), and you wont need to do so again they will automatically pair thereafter, as soon as you turn the headphones on, providing your device has Bluetooth mode switched on. 17 ( l ) x 19 ( w ) x 7 ( h ) cm ABS & PU charging cable, 3.5mm jack audio cable and user manual are included Bluetooth version 5.3 Bluetooth distance: 10 metres frequency range: 20Hz – 20kHz built-in microphone supports call pick-up battery: 200mAh playback time: 6 – 8 hours sensitivity: 114 db/mW type-C charging port input: 5V/1A foldable and portable design item is packed in flattened position in tray packaged in a Swiss Cougar gift box