It replaces default Magento's product image zoom with a new template and a new js.
Don't forget to download and insert into Magento RoomZoom.js Plugin. You can easily download it from
https://github.com/roomine/RoomZoom.js Compatable with RoomZoom.js version 1.2.x
Works on Magento Community edition 1.5 or higher.
Enterprise edition not tested.