First, download the duoCo StripX app, and make sure to download the version with "X".
After downloading the app, start your scooter, turn on your phone's Bluetooth, and turn on the screen shown in the image. Find your device and click on the "link" icon next to it to connect.
When the chain is in a linked shape, it indicates a successful connection. Click on the solid color light on the page shown below for check.