Please refer customer to user manual for instructions on how to connect via Bluetooth, section – MGI & Sureshot App or view the video
If required, also please view the below video link, specifically from the 1.30 minute mark on how to connect/pair the Axis with the App.
Refer to user manual, section - Registering
Click link to Sureshot User Manuals > https://mgigolf.com/pages/sureshot-axis-manual
Or, select Support on the top of the page > then User Manuals > Sureshot > then your model