Use the Quick Wireless Connection USB Key to provide fast, ad hoc, wireless connectivity (PC only). There is no need to connect over a network. In a matter of seconds, the key will obtain the information necessary for setup. When you're done, simply disconnect, and your original settings are restored - no reconfiguration required. A wireless LAN module is required and sold separately.
Epson ELPAP09 Quick Wireless Connect USB key - wireless USB key