•  Gratis

Newsletter

This box will allow visitors as will as customers to signup to your Newsletter module.

It's included in the initial installation of that module once purchased, but there might be new versions, and that why you can download it seperately here.

After enabling you need to add the newsletter list ID in
Settings → C Advanced → Modules → Newsletter.

The infobox contains an input field for email and 2 buttons:
Subscribe
Unsubscribe
The layout will follow the rules defined in Your theme.