[Plugin: Contact Form 7 Dynamic Text Extension] Is textarea supported or just text field?

Hi,
I’d love to use this plugin to create a hidden field with lots of information (i.e. multiple lines). Does this only allow for a text field (i.e. one line of information) or can it also show multiple lines if needed?
thanks!

http://wordpress.org/extend/plugins/contact-form-7-dynamic-text-extension/