To activate your Gem Ring, press the button underneath the gem for a wild flashing light show. NOTE: One size fits most Dimensions: Height: 1.50 in. Diameter: 1.87 in. LED Colors: 2 Red, 1 Blue, 1 White LED Huge Gem Rings come packed in a display box of 24 pieces. Batteries are NOT replaceable.To activate your Huge Gem Star Ring, press the button located on the back. Cycle through 3 LED functions: Blink Flash SteadyLED colors: Red to match red shell, White to match clear shell, and Blue to match blue shell. Sold in pack of 24. When you buy 1 you will receive 24 PCS, when you buy 2 you will receive 48 pcs and so on.