Light up the night and stay safe when walking or jogging at night with this LED light up hat. Also great for night sports. A traditional baseball cap style with glowing rim. This luminous hat features 3 light functions; flashing, blinking and steady on. It can easily be turned on or off with a hidden button tucked inside the rim. Batteries are included and replaceable (takes 2 CR 2016 lithium button cell batteries). This one-size-fits-most adult hat has an adjustable velcro closure. Adjustable velcro closure One size fits most Batteries included and replaceable (takes 2 CR2016 lithium button cell) 3 functions: flashing blinking, steady on Turns on\off with hiddden button inside rim