1. After the projector is connected to a video signal source (such as a computer), press the power button to turn it on, and the projection screen will be blurred.

2. Adjust the focus ring of the projector (above the projector lens) to adjust the definition.

3. If the focus ring is still blurred after adjustment, please set the video output resolution of the video signal source (such as a computer) to the real resolution of the projector.

BenQ MX660 is a commercial education projector with DLP projection technology and a height of 3200 lumens. A projector, also known as a projector, is a device that can project images or videos onto a screen. You can connect with computer, VCD, DVD, BD, game machine and DV through different interfaces to play corresponding video signals.