Hi-res audio certified: custom oversized 40 mm dynamic drivers produce hi-res audio—a certification only awarded to audio devices capable of producing exceptional sound. life q20 active noise cancelling headphones reproduce your music with extended high frequencies that reach up to 40 khz for extraordinary clarity and detail. reduce ambient noises by up to 90%: our team of engineers conducted more than 100, 000 tests in real-life scenarios to fine-tune life q20's 4 built-in anc microphones and digital active noise cancellation algorithm. as a result, the hybrid active noise cancellation can detect and cancel out a wider range of low and mid-frequency noises such as cars and airplane engines. 100% stronger bass: our exclusive bassup technology conducts real-time analysis of the low frequencies to instantly strengthen the bass output. double press the play button when listening to bass-heavy genres like edm and hip-hop for an amplified listening experience. 40-hour playtime: up to 40 hours of non-stop playtime in wireless active noise cancellation mode (at 60% volume) is extended to an enormous 60 hours in standard music mode. a single charge gives you enough juice to listen to over 600 songs or soundtrack multiple long haul flights. and when you’re in a rush, charge life q20 active noise cancelling headphones for 5 minutes and get 4 hours of listening. universal comfort: memory foam earcups gently mold around your ears, while the headband’s rotating joints automatically adjust the angle of the earcups to fit the shape of your head. this ensures that life q20 active noise cancelling headphones deliver maximum comfort and a secure seal.