Our LED Bangle Bracelets are great for all occasions! To activate, press the button inside of the bracelet. These bracelets have a diameter of 2.56 inches. Batteries: 3, AG3. Replaceable, included and installed. Sold 6 per pack. The multicolor electronic LED flash bracelet is custom made by BeesClover LLC, and BeesClover is an exclusive Brand owned by BeesClover LLC. If any other questions, please contact with BeesClover.