Product Description Experience the magic of TREASURE concerts with the Official Light Stick Ver.2. This enhanced version features improved brightness and durability, designed to light up every moment of your favorite performances. With intuitive controls and a sleek design, it's the perfect companion for any fan. Create an unforgettable concert atmosphere and connect with thousands of other fans as you wave your light stick in perfect harmony. Officially licensed and built to last through countless shows. Package Contents: Light Stick, Strap, User Manual Power Requirements: 3x AAA Batteries (batteries not included) Battery Charging: USB Micro-B 5-pin (rechargeable batteries not included) Operation Modes: Standard + Bluetooth (App) + Central Control (Concert) Precautions for handling 1. Keep the product at room temperature, and away from high temperatures and humidity. 2. Do not look at the light directly at a close distance. 3. Be careful not to drop the product as impacts may cause the light color to change. 4. Do not swallow the parts or put them in the mouth. 5. Use standard alkaline AAA batteries that were not used before. Avoid using manganese or used batteries. 6. When the battery is low, some colors may not light up and the lightstick may be turned off. Please note that this is not a product defect. 7. Make sure to correctly check the polarity (+, -) of the batteries. Incorrect placement may cause overheating and damage to the product. 8. In case of overheating, please turn off the power and remove the batteries. 9. Store the lightstick without batteries in it, or it may lead to battery leakage. 10. It is a wireless control product that consumes batteries quickly when operating under central control in concerts. We recommend that you use new batteries for each concert. 11. Please keep the battery completely separate when you are not using the light stick.