The Bose Quiet Comfort 20 Acoustic noise cancelling headphones are a must for any music lover who likes to listen to their favourite tracks without disturbance Built in Active EQ & Tri Port technology deliver crystal clear sound & deep rich bass allowing you to get lost in your music. At the touch of a button you can turn on the aware mode, perfect for hearing those important announcements or when you just need to be a bit more alert but still like to hear the music playing. The cone shape ear tip fits neatly into the ear for maximum comfort spreading across the ear giving you the full noise spectrum. Stay in total control thanks to the inline microphone & slider module to turn noise cancelling on & off. The microphone/remote houses the aware mode & call answer & end functions, whilst a 4 button remote provides music & volume control plus voice recognition for apps like Siri