The peculiarity of these glasses was the possibility (left / right) by briefly pressing the On to change the channel assignment switch. That can not be my other glasses, but they do not need it actually, because the channel assignment determined immediately after power or signal interruption, as if you briefly leave the room with the glasses. Not so with these glasses, where you quite often this button has to operate, just to eliminate a reversed assignment of the channels, even immediately after switching on! Viewers with less "3D experience" Remember possibly only, "that something is wrong," because the image due to incorrect assignment also still "somehow spatially" appears and I myself, as the performer, of course, impossible individually the glasses of my guests to can check the correct assignment. I also have no desire to do so because my other glasses I do not need it just it! The extremely narrow hinges of these glasses also act unfortunately rather delicate and not very inspired confidence in more frequent use ....
The greatest deficiency of this spectacle is but its pretty poor white flash coverage of the sync pulse. You will cause all the dark parts of the image very clearly (!) To lighten the image and thus looks quite dull. Who has no other glasses for comparison which could possibly think that the image should look at 3D as and be just as happy with the quality offered anyway. In direct comparison with my other glasses but the difference is like night and day! This quality is therefore out of the question for me!
Those looking for an affordable alternative to the more expensive, pretty good, but also in the arms and hinges also something graceful acting glasses of the brand "Blue Heaven", which should look on Amazon after the type G05-DLP. They also come from Chinese production and have been offered in the past under different names, but always with this type of designation. You are also only a few euros more expensive. Brightness and contrast are these glasses very well, thanks to perfect white flash cover! They are only very slightly heavier and seem a bit "clumsy" because with them apparently a little more material was installed. In particular, the hinges are considerably wider and but also leave for a more robust impression. Although they are only to change frequency 120 Hz specified (even in the operating instructions!), But operate according to my own experience with the 144 Hz frequency of my Benq TH681 completely trouble-free to my complete satisfaction!