Acrylic knit beanie with integrated LED light panel made of ABS and TPR; Uses 2 button cell batteries (CR2032), included, replaceable; Features 4 bright white LED lights with 3 levels of brightness: 100%, 75%, and 50% (From off setting, press black button once to achieve 100% brightness, a 2nd time for 75%, a 3rd time for 50% and a 4th time to turn off); LED light: 120 lumens; Hand-wash only Remove light panel prior to washing; Product Size: 7.87 w x 10.75 h