For installation variant A you need:
Helmet adapter with tabs
TILSBERK Head-Up Display
TILSBERK HUD App
Note
Before installation
For secure mounting, all adhesive surfaces must be clean, dry, and free of dust and grease. Therefore, please clean all smooth surfaces thoroughly with an alcohol-based cleaner such as spirit or rubbing alcohol before mounting. Adhesion is better on surfaces made of fabric - nevertheless, these surfaces should also be cleaned.