Have acquired as an alternative for the original BenQ Shutterbrille me those glasses. The price of these glasses is approximately 1/3 the price of the BenQ-glasses, so I was initially a little skeptical. My fears, however, were completely unfounded. The glasses looks very good, has a neat package (which I'll save for storage) and in addition to a cleaning cloth and a cloth bag even a USB charging cable while. I have now looked at me with this Avatar 3D and I'm absolutely thrilled! The glasses work perfectly and is really fun! Also suitable for spectacle wearers (simply put the 3D glasses on the glasses - works!). Both existing BenQ projector so that work great. Will definitely buy another one of these glasses. Topp! Buy recommendation for BenQ projectors.