Specification:BrandBIKIGHTMaterialPure Cotton Material + EL Light + PlasticSizeAbout 17*21cm(W*L)Battery2 x AAA battery (not included)Feature:High Quality Craftsmanship.Make yourself cool and flashing in group.Nice gift for your family and friends.Daily waterproof.Note: Rotate the wheel under the mask, then turn on the switch and voice your sound,the mask will glow.The highersensitivity, the better induction effect it is.Package included:1x Full Face Mask