Ambience control (noise-cancelling, hear-through, talk-through) can be employed for music playback and calls Hear-through function allows you to hear ambient sounds (plus your own, unmuffled voice) so you can talk to others around you without removing your earbuds Soundscape function plays relaxing sounds of nature, a masking noise to help you concentrate, or sounds for meditation Multipoint pairing function allows you to stay connected to two Bluetooth devices at once Approximately 6.5 hours of continuous playback and up to 13.5 hours of extended use with the charger (for 20 hours total)