I guess the eh412st is supposed to be a business projector...but would it work well for a home theater set up?

I believe that yes, its Short throw lens: experience a large 120" Image projected from 4. 5 feet away, at throw ratio 0. 5: 1; short throw Projectors allow placement closer to the screen making it ideal for more smaller spaces and easier installation.

Is it bright enough to use outdoors during daytime if placed in the shade?

I would say, No. This is a great projector with a very short throw, but it is NOT overly bright. I bought for a golf simulator in the garage. Even the sunlight from the one window can be enough to make it a bit hard to see at times. You might be able to make it work with the right shade, and screen setup, but I would not recommend if the primary intended use is outdoors during the day time.

I see that it has a usb port. will this allow me to plug in a usb flashdrive and read/present files in formats such as pdf, ppt, or doc?

Thank you for your interest in the EH412STX projector. This unit's USB is only for power out. If you have any further questions, please contact Optoma technical support at 888-289-6786 Monday - Friday 6 AM - 5 PM PST for further assistance.

would this projector work for a conference, in a lit breakout room? Main concern is the brightness and being seen. Thanks.

In terms of brightness, the EH412ST has 4,000 lumens. Lighting requirements vary depending on the type of room being lit, room size by square footage, etc.. Here is some quick math as one application (dining room, other applications have recommended foot candles, free foot candle chart generally available online) example: A 100-square foot dining room, which needs 40 foot-candles, will need 4,000 lumens. If you have any further questions, please contact Optoma technical support at 888-289-6786 Monday - Friday 6 AM - 5 PM PST for further assistance.

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Description

🎥 Elevate Your Presentations with the Optoma EH412ST!

VIVID VISUALS - Experience stunning 4K HDR input for vibrant colors and deep blacks.
BRILLIANTLY BRIGHT - 4000 lumens ensure your presentations shine even in well-lit rooms.
PORTABLE POWERHOUSE - Weighing under 8 pounds, take your presentations anywhere with ease.
TRANSFORM YOUR SPACE - Project a massive 120" image from just 4.5 feet away, perfect for tight spaces!
SEAMLESS CONNECTIVITY - Multiple ports including 2 x HDMI and USB-A for effortless setup.

The Optoma EH412ST is a professional short throw projector designed for business presentations and classrooms, delivering a bright 4000 lumens output, a long lamp life of 15,000 hours, and extensive connectivity options, all in a portable form factor.

Specifications

Contrast Ratio	50, 000: 1
Maximum Throw Distance	11.3 Feet
Light Source Operating Life	15000 Hours
Maximum Image Size	316 Inches
Lamp Wattage	125 Watts
Voltage	120 Volts
Vertical Keystone Correction	1 Meters
Minimum Image Size	36.2 Inches
Hardware Connectivity	VGA, USB, HDMI
Control Method	Touch
Minimum Throw Distance	1.3 Feet
Mounting Type	Ceiling Mount
Brightness	4000 Lumen
Color	White
Wattage	125 watts
Controller Type	Button Control
Additional Features	Short Throw
Connectivity Technology	2 x HDMI, VGA in and out, audio-in and out, RS232, and USB-A
Native Resolution	1920 x 1080
Display Resolution Maximum	480p, 720p, 1080i, 1080p, 480i, 525i, 525p, 625p, 625i, 576i, 576p
Display Type	LCD
Form Factor	Portable
Item Weight	7.7 Pounds

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