Features: 1. It is more environmentally friendly and practical than traditional single-use glow sticks that use hazardous fluorescent materials. 2. The glow stick is powered by 3 AAA batteries and can be used for up to 12 hours. 3. Press the left button (grooved button) or right button to turn on the light 4. Hold the left or right button for about 3 seconds to turn off the light 5. Press the left button to move to the following pattern and the right button to go back to the previous pattern. 6. Press the right button when the light is off. When the unit turns on, the light will begin as red. Specification: Material: ABS Size: 25*3cm Power Supply: 3x AAA Battery(Not included) Lighting time: about 6 to 8 hours of continuous lighting includes: 1x Glow Sticks