Kpop Seventeen Lightstick Carat Bong Ver. 2 Bluetooth Light Sticks for Cars

Product size: 95.3mmx92.5mmx246.2mm. The product includes a backup lamp a lanyard a manual a sticker. The customer needs to provide 3 batteries of No. 7. The product itself does not include. With Bluetooth function, the customer's mobile phone needs to download an app setting light stick ver2). Bluetooth connection control discoloration. How to connect to Bluetooth and change color?. 1. Download an app in ios app store: SEVENTEEN OFFICIAL FANLIGHT VER. 2.2. Turn on the phone Bluetooth and Trun on the light stick. 3. Open the app and to change the color of the app