In 2 screen mode what is the aspect ratio? The images provided show each side as full screen? Shouldn't they be letter boxed?

This device does not maintain aspect ratio. It stretches the image if needed to fill the layout. So for side-by-side the images are vertically stretched.

Does it take 4 1080p inputs and outputs a 4k of the combined 4 1080p inputs ?

It outputs a maximum of 1080p whether you are displaying 1 input or 4. The screen says its displaying each at 1080p but my monitor shows that it’s only receiving a combined 1080p signal. I’ll be sending mine back, as having four 960x540 screens looks absolutely horrible and most text cannot be read.

On a 4k @ 60hz tv, if my 4 inputs are 4 mac mini 2012 (hdmi 1.4 1920x1080), will I see the same 1920x1080 resolution for each mac with 4 screen mode?

Yes you will. What ever input you connect will show in that resolution in 4 screen mode.

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HD-401MR Quad Multi-Viewer 4x1 HDMI Switcher 4 Ports Seamless Switch and IR Remote Supports up to 1080p

Product ID: 267964425

Details

Brand
OREI
Cable type
HDMI
Colour
black
Compatible devices
Monitor
Connector type
HDMI

🎵Supports Dolby Atmos & DTS:X audio

📺5 versatile multi-view modes

🔄4 HDMI inputs, seamless switching

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎬 Elevate your screen game—see more, switch faster, sound richer!

FLEXIBLE CONTROL OPTIONS - Operate via front panel, IR remote, or RS-232 for seamless integration into any workspace setup.
GLOBAL READY POWER SUPPLY - Auto-switching 100-240V power adapter ensures reliable performance anywhere you work or play.
IMMERSIVE AUDIO COMPATIBILITY - Supports advanced audio formats including Dolby Atmos and DTS:X for crystal-clear, cinematic sound.
EFFORTLESS 4 IN 1 HDMI CONTROL - Switch between 4 HDMI sources instantly with zero lag for uninterrupted productivity or entertainment.
CUSTOMIZABLE MULTI VIEW EXPERIENCE - Choose from 5 dynamic viewing modes to monitor multiple feeds simultaneously—perfect for multitasking pros.

The OREI HD-401MR is a professional-grade 4x1 HDMI switcher with multi-view capabilities, supporting up to 1080p resolution and advanced audio formats like Dolby Atmos. It offers seamless, real-time switching between four HDMI sources, five customizable viewing modes, and multiple control options including remote and RS-232. Designed for global use with an auto-switching power supply, it’s ideal for managers and tech-savvy professionals who demand efficient, high-quality AV management.

Specifications

ASIN	B07H5TF6X2
Best Sellers Rank	#7,082 in Electronics ( See Top 100 in Electronics ) #18 in Audio & Video Selector Boxes
Brand	OREI
Cable Type	HDMI
Color	black
Compatible Devices	Monitor, Television
Connector Type Used on Cable	HDMI
Customer Reviews	4.4 4.4 out of 5 stars (439)
Global Trade Identification Number	00854339007731
Item Weight	680 g
Manufacturer	OREI
Mfr Part Number	HD-401MV
Model Number	HD-401MV
Number of Ports	4
UPC	854339007731
Unit Count	4.0 Count

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