Keep the lights focused on your brand at your next promotional event with this LED baseball cap! This LED baseball cap is made of cotton, with one size fits all. Easy "on/off "switch concealed in the brim, lithium battery replaceable, continuous use up to 72 hours. Best enjoyed and viewed in a low light or dark environment and can be avoid some potential traffic dangers. Widely used in night club, disco, KTV, bar, banquet, party, floor show, stage show, evening show, performance show, and some other special events. It can be customized with an imprint of your company name, logo or advertising message.