LENKENG LKV342PRO - 4-In-2-out HDMI Matrix Switch. Supports up to UHD 4K2K@30Hz & 1080p Full HD.

https://www.lenkeng.com/p_detail/134/type/types

LENKENG HDMI Matrix Switch with 4x HDMI inputs & 2x HDMI Outputs. Supports up to UHD 4K2K@30Hz & 1080p Full HD. Supports 12-bit Deep Colour, CEC, HDCP, IR Remote Control. Includes remote.

This 4x2 HDMI Matrix Switch has 4x HDMI inputs and 2x HDMI outputs. It is a true matrix switch and can distribute any one of 4x sources to any 2x displays and can work as a splitter to show the same source on 2x displays simultaneously. Analogue R/L audio and digital SPDIF audio can be extracted from HDMI signal. It supports 3D HDMI and HDMI1.4 (4K2K). 

Features

• Routes four Ultra Hi-Def sources to two Ultra HD displays
• Supports resolutions up to Ultra HD 4K2K (3840 x 2160@30Hz) and 1080p Full HD
• Supports 12-bit Deep Color
• Supports PCM, Dolby Digital™ and DTS Digital Surround™
• Support audio output simultaneously (from output A)
• HDMI input/output cables may be up to 10/15m with a 1080p/8-bit resolution
• Supports HDMI/MHL dual mode input (input 1)
• Supports CEC
• Supports HDCP
• Supports IR remote control
• Supports surface-mountable
• Includes remote control (LKV342PRO-REMOTE)

The LENKENG LKV342PRO 4x2 HDMI Matrix Switch allows you to connect four HDMI sources (such as Blu-ray players, gaming consoles, or PCs) and output them to two displays (TVs or projectors). However, it does not support video merging or multi-view (e.g., displaying all four inputs on one screen at the same time).

What it Can Do:

? Switch between different HDMI sources to output to one or both displays.
? Send different sources to different outputs (e.g., Source 1 to TV 1, Source 2 to TV 2).
? Duplicate the same source to both outputs.

What it Cannot Do:

? Combine all four inputs into one single screen (like a video wall or multi-view mode).
? Support Picture-in-Picture (PIP) or Quad-view.

If you need to display all four sources on one screen simultaneously, you would need a multi-view HDMI processor instead of a matrix switch. Let me know if you need recommendations!