These LED bracelets comes with a variety of bracelet colors and light colors. To activate, just take out the inserted insulation sheet. Silicone material wristband provides great comfort when you wear. Perfect for Night club, Bar, Music Concert, Parties, Weddings, Birthdays, Festivals, Holiday celebrations and more. Batteries included and installed for 8 hrs or longer constant using. QUR for sound activited options. | ||||||||