Experience exceptional sounds with the Porodo Soundtec Zen Active Noise-Cancellation Headphone. These headphones come with comfortable cushions that allow you to wear them for long periods. The sophisticated noise-cancellation system is so good that it cuts off external sounds entirely. You will also appreciate the 40mm speaker driver which delivers rich and balanced music. They have a 300 mAh battery capacity that takes only 2 hours to recharge. You can have an enhanced audio encounter when wearing the Porodo Soundtec Zen Active Noise-Cancellation Headphone as it has state-of-the-art headphones with noise-cancelling capabilities, outstanding sound quality, and ergonomic design.