These bracelets measures a diameter of 2.25 inches, features 3 functions: slow flashing, fast flashing and constant on. Press the button inside of the bracelet to activate easily. They can be used for multipal events and occasions, such as Parties, Birthdays, Festivals, Halloween, Weddings, Night Activities, Bonfires and more. Batteries included and installed. Available in variety of shinning colors. QUR for motion / sound activited options. | ||||||||