All-day comfort: the small, lightweight headphones feature an ergonomic surface design for all-day comfort - suitable for smaller ears Alone with the music: background noise can be hidden with the digital noise cancelling - whereas the ambient sound mode ensures that you stay connected to the environment Every beat in high quality: DSEE plays music with authentic voices and powerful bass; the sound can also be personalised in the app and thus enjoy the comprehensive 360 Reality Audio Certified experience Clear and reliable call quality: the wind reduction of the headphones ensures clear voice reproduction, even on windy days outdoors Bluetooth multipoint connection: With the Bluetooth Multipoint Connection, even two Bluetooth devices can be connected at the same time. (Compatible with Android, iOS, Windows and MacOS - not limited to Sony devices) Long-life battery for daily use: with the noise cancelling switched on, you can use 15 hours. Enjoy music playback (or 20 hours with noise cancelling switched off), fast charging, IPX4 water resistance and other intelligent functions