éCan be used on shoes or anywhere on costume. They are the newest thing on the led market today and kids go nuts for them. They are fun for festivals, clubs, raves and discos too. They are very strong to last a long time and small batteries to last days. 3 Flashing settings: on/off, Flash, Double Flash. Made of high transparent plastic material. Washable and safe without wires. Batteries incl. One size fits all. Length 90 cm. 2 pieces is in each single orderé