Conambo CQ7 Active Noise Cancelling Bluetooth Headphones, Over Ear Wireless Headphones w/Mic, SuperiorComfort for Airplane Travel, Office (0.4lb Light Weight, 20-50Hrs Playtime) ACTIVE NOISE CANCELLINGAt a flip of switch, effectively reduces 85% distracting low frequency background noise. *NOTE: ANC works best at reducing consistent Low Frequency Background Noise, including engine sounds, metro noises, large crowds etc. Inconsistent or sudden bursts of sound like a lively conversation, car horn or shouting are usually unaffected Hi-Fi SUPERIOR SOUNDOptimized 40mm acoustic driver combined with an advanced sound IC deliver powerful and steady audio ensuring a smooth but dynamic music listening experience COMFORTABLE WEARINGWeighs only 0.40lb (180g), constructed from lightweight yet durable materials ( seller warranty with 18 month). The high grade protein leather pads and the ergonomically designed adjustable and stretchable headband will allow you to have the perfect and most comfortable fit for a long time wearing WIRELESS AND WIREDThe rechargeable battery provids endless enjoyment of music for up to 20 hours at ANC & Bluetooth mode. In addition, a 3.5mm audio cable also offers 50 hours nonstop music experience BUILT-IN MICROPHONEIn bluetooth mode, Conambo CQ7 provides clear and high-quality calls, Which is convenient for you to free yourself and enjoy hands-free convenience