Outstanding audio quality with Philips stereo headphones Ultra-lightweight headphone designed for comfort during extended use. The bass beat vents produce deep, rich sound. Sounds around you are perfectly blocked out while the sound from the headphone is kept in a sealed chamber for perfect quality. Superior audio quality - Professional headset that enables concentrated transcription in busy office environments - 30 mm speaker driver delivers big sound performance - Bass beat vents allow air movement for better sound For optimal results - Reinforced cable connectors ensure quality and durability - Ultra lightweight headband improves comfort and fit - A 3 meter/10-foot cable for freedom to move about your work area