-43dB Noise Cancellation - Hybrid active noise cancellation with 4 ANC modes, achieving a noise reduction depth of up to -43dB. Switch to transparent mode to stay aware of your surroundings without taking off your headphones 75-Hour Playtime - Enjoy up to 75 hours of playback with ANC off and 45 hours with ANC on. Getting 10 hours of listening from just 15-minute fast charge Hi-Res Audio - Hi-Res audio supported by 40 mm dynamic drivers for rich detail with thumping bass. With wider frequencies of 20-40 kHz under Type-C wired connection Immersive Spatial Audio - Featured a three-dimensional sound stage algorithm, it brings a cinema-level surround atmosphere to immerse you in pure listening Dual-Device Connection - Newest Bluetooth 5.4 with multipoint connection makes it effortless to connect and switch between two devices at once in faster transmission and lower latency AI Clear Call - AI call noise reduction technology separates human voice from noise and amplify it for hand-free clear call Smart EDIFIER App - With various selection of EQs and equalizer adjuster to tailor the sound to your preferences. Switch to game mode of 48ms low latency for ultimate gaming experience All-day Comfort - With protein leather ear cups and a customizable metal headband to adjust the angle to suit users with different head shapes. Foldable design and 266g light weight make it ideal on the go Edifier H9 -43dB Hybrid Noise Cancelling Headphones, On Ear Headphones Wireless with 75H Playtime, Hi-Res Audio, Spatial Audio, Bluetooth 5.4 Multipoint Connection, Clear Calls, Foldable, Custom EQ via APP, Fast Charging