Set of 3. Size: Approximately 4cm in diameter. Double-sided design. Small and convenient coin-shaped volleyball light keychains! To turn on the light, press the center of the volleyball. *The light stays on while you hold it down, but turns off when you release it. Age Recommendation: 6 years and older (Do not give to children under 6 years old) Popular for their convenience in the dark. Popular with a wide range of ages, from adults to children, as it's often dark when returning from club activities. Volleyball goods, gifts, graduation, club activities, souvenirs, school, volleyball-shaped flat light keychains.