Read the full specs here: 
 
https://www.bowerswilkins.com/en-gb/product/over-ear-headphones/px7-s2e/FP44520P.html?srsltid=AfmBOopph_D1NzuPD_U-0LG4jiRk6vQ9XNJrukqvbHjWj7S3djYEr6Hq