The device is essentially identical to TH680 / 681 (There are a lot of reviews) - it is more marketed for the presentation area - a great device. An important selling point for me was the included here wireless dongle for wireless presentation from the laptop. In itself, a good thing - you can leave the dongle work as own AP, then you must, however, first of all select the Wi-Fi laptop, download the software and you're then booked into the AP of the Beamer and has no internet on the laptop - very tedious and bad if you want to present as images from the Internet. The dongle could register himself in the local WLAN, but only if there is no password on the own wireless set. Well, who does that? For this feature is actually of no value to me. The favorable TH681 appears the better alternative.
