Perfect for Riding,Skating at night and Many Sports, Halloween, Costume Parties, Masquerades, Mardi Gras, Rave Festivals, Carnivals, Gifts, and more;
One Size Fits All. Adjustable the velcro of the side to fit your face;
Volume Sensing Technology Automatically Calibrates From concert Volume to conversation Volume
Takes 2AAA Batteries (NOT INCLUDED)
It is light and easy to ware.