Adjustable : Suitable for adults, boys and girls. One general size fits most. You can adjust the size of the cap by the velcro at the back
Material: Cotton. CR2016 lithium battery continuous work up to 72 hours (battery is replaceable). You could purchase the battery on watches shop, electronic mall, supermarkets.
Easy to use: "on/off" switch is concealed in the brim. There is a small dot sticker to notify you where the switch is. Four mode can be choose: on, slow flashing, fast flashing, off.
Improve security: Best enjoyed and viewed in a low light or dark environment and can be avoided some potential traffic dangers
Widely used: Make you look cool in dance fitness event, night club, disco, KTV, bar, banquet, party, floor show, stage show, evening show, performance show, vocal concert, and some other special events
