Philips SBCHL140/10 Ultra Lightweight On-Ear Cabled Headphones (Grey) An ultra lightweight headphone for extended use, with air vents for rich deep sound.Ultra lightweight headband improves comfort and fit. Reinforced cable connection ensures extra durability. A soft plastic part on the earshell reduces cable strain, protects the connection and prevents damage from repeated bending. 30mm speaker driver delivers big sound performance. Compact for wearing comfort yet big enough to deliver crisp, powerful sound, the 30 mm speaker driver is a perfect size for non-distorted listening enjoyment. Bass beat vents allow air movement for better sound. Bass beat vents allow air movement for better sound with a deep rich bass. The slim, lightweight stainless steel headband is so light you'll hardly notice you're wearing it.