PSB’s award-winning wireless active noise cancelling headphones are reborn as the M4U8 MKII with exciting feature upgrades. Enhanced battery life and the latest noise cancelling technology will improve mobile listening; while Audio Personal Sound will compensate for your unique hearing abilities; letting you fully experience PSB Speakers’ renowned sonic signature. Work or play; PSB Speakers’ headphones are designed for comfortable and noise-free extended listening. Key Features: - High-performance wireless noise cancelling headphones - PSB’s award-winning “true-to-nature” sound signature - All-digital adaptive noise cancelling (ANC) for pure noise-free listening