About this item 【Active Noise Cancellation】With hybrid ANC technology and 4 microphones, FM20 reduces low and mid-frequency sounds like engine hums and air conditioning, ensuring a more focused sound experience. 【Hi-Res Sound】Custom oversized 40 mm dynamic drivers produce Hi-Res sound and a well-balanced deep bass. Frequency up to 40kHz for improved clarity. 【130-Hour Playtime】FM20 active noise cancelling headphones play up to 75 hours of music in noise cancelling mode. Standard mode extends the playtime to 130 hours, while a short 10-minute charge gives you 12 hours of listening. 【Personalized Spatial Audio】As you listen to music and watch movies, FM20 bluetooth headphones built-in audio algorithms and keeps you in the center of the sound, creating concert-like spatial immersion. 【Ultra Comfortable Design】FM20 headphones uses ultra-soft protein leather earcups, which allows you to wear it for a long time without feeling uncomfortable. The earmuffs can also automatically adjust the angle to suit users with different head shapes. Making them the ideal headphones to work from home or watch your favorite movie.