Sony Wireless Closed-Back Headphones, Black

Has a wireless range of up to 100m Wireless home headphones with 40mm drivers, up to 100m reception range and self-adjusting headband Clear RF wireless transmission 40mm neodymium driver unit Product Dimensions: 1 x 1 x 1cm Product Weight: 272g Wireless range of up to 100m gives you freedom of movement Up to 13 hours of battery life Self-adjusting headband for comfort while listening 40mm neodymium drivers for powerful, balanced sound Frequency range 20 - 20,000 Hz