Noise Loss and Focus: Mpow H17's Active Noise Cancellation technology effectively reduces distracting low-frequency background sounds such as aircraft cabin noise, city traffic or a busy office, so you can focus on what you want to hear and enjoy a clear sound source at the touch of a button.rnrnFast Charging Function for 45-hour playtime: 10 minutes of charging will give you 2 hours of listening time Built-in 650mAh battery won't let you turn off the headphones, you can enjoy a noise-free world for 45 hours on a full charge. Note: When not using the headphones, turn off ANC to avoid power consumption.rnrnExtremely lightweight with soft protein earcups: The new Mpow H17 noise-cancelling headphones use the original protein earcups for your wearing comfort AND the headphones weigh only 204g for long-lasting wearEnjoy an enhanced and fully customizable fit with adjustable swivel earcups & foldable headband and super soft earcups.rnrnCVC6.0 Microphone for Online Class/Home Office:Built-in CVC 6.0 microphones ensure crisp, clear calls Compatible with Android/iOS smartphones and tablets, MP3 MP4, iPod PC TV and other Bluetooth-enabled devices, making them ideal when you're working from home, taking online classes or traveling. Note: The microphone can only work in Bluetooth mode.rnrnBrilliant Music Experience:In beautiful silence, you'll hear balanced bass and hi-fi melodies with exceptional clarity provided by the headphones' 40mm powerful transducers with Mpow Active Noise Cancellation, drawing your complete immersion into songs, movies, videos, audiobooks, etc.