Laser finger beams ring have bright LED bulbs mounted in small cases that fit on your fingers with an elastic strap. It includes 4 pieces: Red, Blue, Green, White, each unit is powered by 3 long-lasting coin-cell batteries (all included). Whether you’re heading to a party or into fun long-exposure photography, these are sure to entertain. Why settle for one-time use glowsticks when you can rock these over & over?