What is Max size on wall?

The product says the max size is 100". I tried it on a wall at 120" and it had a bad distortion in one corner. I then installed 120" screen and after a little adjustment getting the screen and projector aligned, I'm now projecting a flawless corner-to-corner 120" screen on this projector. I think they are playing it safe with the 100" recommendation, but if you are willing to put a little time into adjustments, I guarantee you can safely project this onto at least a 120" screen.

I need to be able to output audio over hdmi arc or optical to my sound system. is this possible through the optoma?

The GT5500+ does not have an optical port and does not support ARC. You would have to use a Receiver or Soundbar with HDMI out to use HDMI. If you have any further questions, please contact Optoma technical support at 888-289-6786 Option 2 Monday - Friday 6 AM - 5 PM PST for further assistance.

I like this proyector for the office. my idea is to stream the audio and video to the proyector over wifi from a windows pc. can this be possible?

The GT5500+ does not have any built in wireless features. We recommend looking at an external device like our HD cast pro or Microsoft wireless display adapter that would plug into one of the HDMI ports. Either device will allow you display you whole display with audio to the projector. If you have any further questions, please contact Optoma technical support at 888-289-6786 Option 2 Monday - Friday 6 AM - 5 PM PST for further assistance.

does this support rear projection?

Yes you can change the projection display in the menu. If you have any further questions, please contact Optoma technical support at 888-289-6786 Option 2 Monday - Friday 6 AM - 5 PM PST for further assistance

Brand	Optoma
Product Dimensions	30.99 x 38.48 x 11.99 cm; 4.78 kg
Item model number	GT5500+
Manufacturer	OPTH9
Color	white
Form Factor	Portable
Screen Resolution	1920 x 1080
Voltage	240 Volts
Wattage	5 watts
Are Batteries Included	No
Item Weight	4.78 Kilograms

Optoma GT5500+ 1080p 3500 Lumens 3D DLP Ultra Short Throw Gaming Projector

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