This Extra Field Type is available in Profile Builder Basic or Pro.
Users must Ctrl+Click to select multiple options
You can use this extra field type to allow users to choose multiple selections from a predefined list.
You can specify the field title, meta-name to be stored in the database, description, options, labels and default option(s).
Also, you can set whether this field should be required or not.
This is how it looks like in the front-end.
Profile Builder Pro
Create beautiful front-end registration and profile forms with custom fields. Setup member directories, custom redirects, cutomize user emails & more using the all in one user management plugin.Unlock PRO Features