Experience sound as it was meant to be heard with the PSB M4U 9 Premium Wireless ANC Headphone, where premium comfort meets precision engineering. Featuring graphene-infused drivers, advanced adaptive noise cancellation, and Personal Sound by Audiodo calibration, the M4U 9 delivers a custom, natural, and immersive hi-fi experience wherever you go. With up to 25 hours of wireless play, aptX Adaptive Bluetooth, and PSB’s signature RoomFeel tuning, these headphones redefine what wireless can sound like.