Langder Wired Eye Mask Headphone Music Sleeping Eyemask 3.5mm Audio built in Speaker Plug and Play No Power required Soft Memory Foam Material Washable design Color Pink It is Wired,buit in speakers, HD Audio sound quality,enhance the bass and make you enjoy music freely. No Power required,plug and play.when you want to listen to music,just connect the plug right into iPod,MP3,smartphones. Soft memory foam material, very comfortable to eye.you can adjust it according to your own head size by the elastic strap. It is washable,when it is dirty, you can remove the mask coat , and wash it . It is not only an mask,but also a headphone, you can relax your eyes , also can listen to music.Good for home sleeping,noon rest ,and travelling.