These finger lights can be used for many occasions to have lots of fun with. They are very popular at raves, birthday parties, and many other events that people attend. The finger lights are bright and have a long life and the batteries are replacable. They have an easy push button to turn on and off. You will receive 40 super bright finger lights. Elastic bands make these finger lights easy to attach to your fingers, these finger lights do not not velcro bands that tend to stick and get in the way sometimes.