The LG BG630 XGA Business Projector is a versatile and accommodating multimedia and data projector. With 3200 ANSI lumens and a 5000:1 contrast ratio, you'll see bright and vibrant images all the time. It features an advanced terminal group that includes an HDMI and dual PC inputs. At only 8.4 pounds (3.8kg), it's portable, yet bright enough for stationary applications. For high-def quality signal transmission, this model offers an HDMI input. There are dual PC inputs for connecting more than one computer to a single projector, which broadens the scope of your presentation to include multiple PCs. The video terminals are paired with 3.5mm mini jack audio inputs and an RCA input. There is a monitor output and an audio output as well. The audio output allows you to run the sound through a more substantial speaker