UGREEN Dual-Monitor HDMI KVM Switch for 2 Computers, 4K@60Hz (55455)

Overview

The UGREEN 55455 is a dual-monitor HDMI KVM (keyboard, video and mouse) switch for two computers. Each computer connects with two HDMI cables and one USB cable; two monitors, a keyboard, a mouse and up to two more USB devices connect to the switch, and the top button or the wired desk controller moves the whole set from one computer to the other. It suits a desk where a work laptop and a desktop PC both need the same two screens.

Is it right for you?

• Suits two computers that each have two independent HDMI outputs: a desktop with two HDMI ports, or a laptop with HDMI plus a dock or active adapter that gives a second HDMI stream.
• Both monitors always follow the selected computer. It cannot show computer 1 on one monitor and computer 2 on the other.
• A laptop with only one video stream cannot gain a second external display through this switch; it needs a multi-display dock or a different KVM design.
• Switching is by the top button or the wired controller. If you want keyboard hotkeys or automatic switching, this model does not offer them.
• Up to 4K at 60 Hz, 1440p at 120 Hz or 1080p at 240 Hz, provided every computer, cable and monitor in the chain supports the chosen mode.

Key features

• Two HDMI monitors switched together, in a mirrored or extended layout set in the selected computer’s display settings.
• Three USB-A 3.0 ports and one USB-C 3.0 port shared between the computers, at up to 5 Gbps.
• Video up to 3840 x 2160 at 60 Hz, with 4K at 30 Hz, 2560 x 1440 at 120 Hz and 1920 x 1080 at 240 Hz also supported.
• HDR passes through when the source, cable and display support it.
• Top button or 1.5 m wired desktop controller for switching.
• Four HDMI 2.0 cables and two USB-A 3.0 cables, each 1.5 m, are in the box for the computer side.
• 12 V DC 2 A adapter included; aluminium housing, 157 x 72 x 30 mm.
• Works with Windows, macOS and Linux.

What else you need

• Two HDMI cables from the switch’s HDMI A and HDMI B outputs to the two monitors. These are not included; keep them within 3 m and 28 AWG for reliable operation.
• On each computer: two HDMI outputs that can run the intended two-display mode, plus one USB-A data port.
• A mains socket for the 12 V 2 A adapter, which the switch needs to run.
• For a DisplayPort or USB-C video source, an active adapter in the correct direction to HDMI.

Installation

A desk job, no tools. Connect computer 1 to the HDMI A and HDMI B inputs for channel 1 and its USB cable, then do the same for computer 2. Connect the monitors so that HDMI A input feeds HDMI A output and HDMI B feeds HDMI B; do not cross channels. Plug in the adapter and the wired controller, then set the mirrored or extended layout in each computer’s display settings.

Before you buy

• The front USB-C port carries shared peripheral data only. It is not a host input, a video port or a laptop charging port.
• Safely eject USB storage before switching, because the devices disconnect from one computer and reconnect to the other.
• Wake a sleeping computer before switching; display and USB reconnection can take several seconds.
• Specialised peripherals such as some receivers, capture devices or encrypted drives may not reconnect identically after a switch; test them.
• Wireless keyboards and mice usually work through their USB receiver, but proprietary receivers should be tested.
• On a Mac, check that the model supports two external displays before relying on the two-monitor layout.
• 4K at 60 Hz or a high refresh rate is not guaranteed when any host, adapter, cable or monitor has a lower limit.