Its important to Contact Panasonic for your correct model number, can do this from their web site

However, after purchasing this and going back and forth with Panasonic tech support, we learned that this model is released in the US with the same model number as the EU

The model number wasn't indexed in the search database when I tried it.

And since our phone is an EU phone - even though this is the correct model number - this will not work with our phone

If you happen to search the Support section of Panasonic.com for the installation instructions use the keywords "range extender" instead of the model number.