Hello The price difference between the Epson EH-TW6700W and the EH-TW6700 is CHF249. The only difference is that the version with the "W" still comes with a WiFi transmitter. The WiFi adapter Epson ELPAP10 Adapter costs CHF130.-. So with the EH-TW6700 + ELPAP10 I would be at CHF1004.-. Is there more to the EH-TW6700W, or a better WiFi adapter or software that has to be paid for? Or how is this price difference made up? Thank you and best regards, Dani