The new iiyama ProLite X4373UHSU – power of four displays packed in one.

Introducing a 43” business class monitor offering the power of four monitors packed in one.

October 2021 - iiyama introduces the ProLite X4373UHSU, a 43-inch 4K monitor with Picture-by-Picture function for simultaneous display of up to four different signal inputs.

Equipped with a 4K VA LCD Panel , the monitor guarantees incredibly sharp images and wide (178°) viewing angles making it extremely suited for multitasking.

Spacious and comfortable, with 16:9 aspect ratio, the ProLite X4373UHSU-B1 can display 4 times more information than a Full HD screen. The wide aspect ratio together with Ultra HD resolution and the PbP (picture-by-picture) function allows simultaneous display of images from up to four different input signals, making this display an exceptional work-tool.

The screen size is equivalent to that of four standard HD screens, allowing users to use and manipulate multiple applications, making it an exceptional productivity solution. The panel comes with HDMI, DisplayPort and USB hub ensuring compatibility across various devices, headphone input and 2 x 9W speakers delivering high quality sound.

The blue light reducer and flicker free functions together with a vibrant 400 cd/m² brightness, HDR support and the 10bit 85% NTSC Colour Gamut, deliver stunning image quality while being easy on the eyes. The monitor also features a convenient headphone hook on the back of the cabinet and an infrared remote allowing, among others, volume and OSD menu control. Moreover, the display can be mounted on any wall mount compatible with VESA standard.

The ProLite X4373UHSU-B1 is suitable for a vast range of applications requiring simultaneous display of different content. This includes CCTV, Data Analysis, CAD / CAM, working with pro editing tools, or data virtualization. Moreover, the screens size, audio quality and remote control, lends itself to huddle space meeting environments.


42.5”, 108cm


VA Matrix

Native Resolution

3840 X 2160 @60Hz



Advanced contrast



400 cd/ m²

Colour support

1.07B 10bit (8bit + Hi-FRC) (NTSC: 85%)

Response time



2x HDMI (v. 1.2/2.0), 2x DisplayPort (v. 1.2) and 4x USB port (2x v. 3.0 and 2x v. 2.0)


2 X 9W

Display position adjustments



Headphone hook

Other features

Flicker Free, Blue Light Reducer

For more information: iiyama - ProLite X4373UHSU-B1 43" large format desktop monitor with 4K resolution, offering you the power of four displays packed into one