NOTE: You must purchase a separate Remote Control for LED Light Bracelets to use RF Light Bracelets.Remote Activated Color Changing LED Bracelet are for the adventurous to make their next event or big night out one to remember. Have a festival or concert coming up? Or perhaps a sporting event that needs a little extra oomph as you cheer on your team!Equipped with 12 light functions (including 7 different color combinations), you are in control with Remote Activated LED Bracelets.Remote range is up to 1,000 feet and can control as many remotes as you can fit into a 1,000 foot radius at once. Bracelets stay operational for 3-4 hours once activated.NOTE: Remoted Activated RF Bracelets will not work without transmitter. You must purchase a separate Remote Control for LED Light Bracelets in order to use RF Light Bracelets.Remote Activated Color Changing LED Bracelets come ready to use with 2 CR1625 Batteries.Remote Control (Required) is DC powered and must be fully charged in order to transmit at maximum power.