I noticed slight interference 'on the image; much like ripples (especially on dark images) that were quite painful. I changed the "VGA video input of the projector and the supplied VGA cable but the problems persisted. I do not think it was due to my computer because I did not have this problem with my previous video projector. In short, j 'I used an HDMI cable and everything is back to normal perfect picture very clear and well contrasted in the user manual (download; one of the box is ultra slim but sufficient).. they say that the lamp veeeeeery can last a long time and especially that it weakened slightly over time. The speaker is, uh, no, but there is a jack for connecting external speakers that give up a very good sound. I find the camera a bit noisy but not annoying. I add a note after a few days of use. Windows tends to semmêler brushes and the sound sometimes out on the computer instead of the projector. To remedy this, the Control Panel is opened and then click "Hardware and Sound" and then right click on "Sound" and "create shortcut". Then obtained a new icon on the desktop. After turning on the projector, click on this icon (a speaker) and selected HDMI default before starting the film. Once the projector off, click again on the icon to return the speakers of the computer by default!
