OREI Quad Multi HDMI Viewer 4 in 2 Out - Seamless 4K Switching

In this review of the OREI Quad Multi HDMI Viewer HDS-402MV, the bottom line is simple: it is a practical fit for anyone who needs to feed up to four HDMI sources to two displays with fast, seamless switching and flexible viewing layouts. The reviewer found the unit especially useful for small security stations, multi-source entertainment setups, and mixed PC/console rigs because it handles up to 4K@30Hz, offers picture-in-picture placement, and provides both optical and L/R audio outputs for downstream devices.

Key Features

• Quad inputs, dual outputs: The 4-in/2-out design lets you connect four HDMI sources and route them to two independent displays without swapping cables.
• Seamless switching: Real-time switching across inputs keeps interruptions minimal when jumping between a console, PC, or media player.
• PIP and multi-view: Picture-in-picture capability allows a secondary source to be shown in any corner so you can monitor two feeds at once.
• Audio flexibility: Audio is available via optical or L/R outputs and supports LPCM, AC3 and DTS for integration with sound systems.
• Multiple control options: Change inputs using the included IR remote, front-panel buttons, or RS-232 control for integration into a control system.
• Wide device compatibility: Works with gaming consoles, streaming players, DVD or Blu-ray players and security cameras that use HDMI signals.

Who It's For

The OREI HDS-402MV is aimed at home theater enthusiasts, small office or retail security setups, and multimedia hobbyists who need to manage several HDMI sources on two displays without frequent cable changes. Its support for 4K and PIP makes it suitable where picture quality and layout flexibility matter more than ultra-high refresh rates.

It is less appropriate for users who demand high refresh gaming beyond 30Hz at 4K or those who require advanced audio return features; professionals needing 4K@60Hz or HDR pass-through should look for a higher-spec matrix.

Pros & Cons

Pros

• Connects four HDMI sources to two displays for flexible monitoring and viewing.
• PIP and multi-view modes let you place a secondary window in any corner for easy comparisons.
• Optical and L/R audio outputs plus support for LPCM, AC3 and DTS maximize compatibility with AV gear.
• Includes remote, power supply and mounting brackets for quick installation.

Cons

• 4K support is limited to 30Hz, so it is not ideal for users who need 4K@60Hz gaming performance.
• No HDR or advanced high-refresh features are mentioned, which may matter to video professionals.

Specifications

Model	HDS-402MV
Inputs	4 HDMI
Outputs	2 HDMI
Video Support	4K@24/25/30Hz, 1080p@50/60Hz, 720p@50/60Hz, up to 480p
Audio	LPCM, AC3, DTS; Optical and L/R outputs
Control	IR remote, front panel buttons, RS-232
Included	Switch unit, power supply, remote, manual, mounting brackets

Our Verdict

The OREI Quad Multi HDMI Viewer HDS-402MV is a practical, value-minded matrix for anyone who needs reliable multi-source viewing on two displays with picture-in-picture and basic 4K support. It is best for home AV setups, light security monitoring, and mixed console/PC use where 4K@30Hz and flexible audio outputs cover most needs.

Frequently Asked Questions

Can this unit show two sources on one screen?
Yes, the unit supports picture-in-picture and several multi-view modes so you can display a primary source with a secondary window in a chosen corner.

What audio outputs are available?
Audio is available via optical (TOSLINK) and stereo L/R outputs and supports LPCM, AC3 and DTS formats.

How do you control input switching?
Inputs can be switched using the supplied IR remote, the front-panel buttons, or via RS-232 for external control systems.