There is no ON/OFF button for this item it works simply by shaking it! Hold the Rocket Lamp in your hand and shake it to see a magical light show. The lights make a smooth transition from color to color illuminating each sparkle the sparkles only move as much as you agitate the lamp. The LED lights stay on for 1 minute after shaking. Specifications: Height: 6 in. Width: 1.75 in. LED Colors: 1 Red, 1 Blue, 1 Green