Top features: – Noise cancelling technology helps to block out noise – Aware Mode keeps you safer – TriPort technology brings music to life – Stay in control with in-line controls – Advanced ear tips let you stay comfortable Noise cancellingLose yourself in the music or let the world in. Bose’s first in-ear noise cancelling headphones let you enjoy great sound, wherever you are. Turn on noise cancelling to reduce outside distractions including traffic and background noise or active the Aware Mode to stay in touch with what’s happening around you.Aware ModeEnjoy your music while staying aware of your surroundings. Whether you’re crossing a busy street or waiting for an announcement – simply press a button and Aware Mode lets you tune into the sounds around you while still playing your music.TriPort technologyBose’s Triport technology, combined with ActiveEQ delivers depth and balance to bring your music to life. Enjoy lifelike digital sound like never before with subtle details, crisp highs and deep lows.Stay in controlGet control at your fingertips, with the QC20’s in-line remote control and microphone. Use the slider to switch on Aware Mode, answer calls, change tracks or pump up the volume. The 4-button remote also gives you access to voice-recognition apps like Siri or Google Search – perfect when you’re on the go.Advanced ear tipsThe StayHear+ eartips deliver a comfortable and secure fit, so you can listen to your music for hours, without noticing them. Combined with Acoustic Noise Cancelling technology they also physically block noise, so you can focus on the music.Charge up in just two hours and enjoy hours of better sound, with the Bose Quiet Comfort 20i Noise Cancelling Headphones.