UGREEN Dual-Monitor HDMI KVM Switch for 2 Computers, 4K@60Hz (55455)
Overview
UGREEN 55455 is a 2-computer, 2-monitor HDMI KVM switch. It routes two HDMI channels and one USB host-data connection from the selected computer to two HDMI monitor outputs and four shared downstream USB ports. Pressing a button moves the complete workstation together.
- computer inputs
- HDMI monitor outputs
- maximum listed video mode
- shared USB 3.0 data ports
- USB interface ceiling
- required DC power
What it does well.
Key features
At a glance
The major capabilities and boundaries of this SKU, without borrowing specifications from similarly named models.
Two-host dual-screen control. Share Monitor A, Monitor B and four USB peripherals between two computers, with one computer active at a time.
High-resolution HDMI path. UGREEN lists 4K@60Hz and 4K@30Hz plus 2560 x 1440 at 120Hz and 1920 x 1080 at 240Hz.
Four-port USB 3.0 hub. Three USB-A and one USB-C downstream port move with the selected host and are rated up to 5Gbps for data.
Two manual controls. Switch with the button on top of the KVM or place the supplied 1.5m wired controller within reach.
Complete host-side kit. Four HDMI host cables, two USB host cables, the controller and required DC adapter are included.
Clear no-matrix behaviour. Both displays and all USB peripherals follow the same selected computer; sources cannot be split across the two monitors.
Port and connection map
Six video sockets plus host and peripheral USB
The rear panel carries two HDMI inputs and one USB host-data input for Computer 1, the same three inputs for Computer 2, two HDMI monitor outputs and the 12V DC power input. The front panel carries the wired-controller socket and four downstream USB data ports.
HDMI channels are paired: each computer’s HDMI A feeds Monitor A output and HDMI B feeds Monitor B output. Keep A and B consistent throughout the cable path.
Important: every computer needs two independent HDMI video outputs and one USB-A data connection. The four supplied HDMI cables are used from the two computers to the KVM; add two suitable HDMI cables from the KVM outputs to the monitors.
- Computer 1 inputs: HDMI A, HDMI B and one USB-A host-data connection.
- Computer 2 inputs: HDMI A, HDMI B and one USB-A host-data connection.
- Monitor outputs: HDMI A and HDMI B, one cable to each monitor.
- Shared downstream USB: three USB-A 3.0 plus one USB-C 3.0, data up to 5Gbps.
- Controller port: connects the supplied 1.5m wired desktop button.
- DC input: 5.5mm 12V/2A adapter; must be connected for proper operation.
Up to 4K@60Hz, with mirror or extend controlled by the active computer.
Video resolution and display layout
UGREEN lists 3840 x 2160 at 60Hz and 30Hz, 2560 x 1440 at 120Hz and 1920 x 1080 at 240Hz, plus HDR output. Both host video outputs, the KVM, output cables and monitors must support the chosen mode.
Configure mirror or extended display mode in the selected computer’s graphics settings. The KVM transports the two HDMI channels; it does not arrange desktops, create a second video stream or override the operating system’s display limits.
Practical limit: Both monitors always follow the same selected computer. This product cannot split Computer 1 and Computer 2 across separate displays.
- Use two independent HDMI outputs from each computer.
- Match HDMI A input to HDMI A output and HDMI B input to HDMI B output.
- For the most demanding modes, use appropriately rated cables and matching monitors.
- The gallery recommends output HDMI cables within 3m and 28AWG.
Three USB-A ports and one USB-C port move with the selected host.
Shared USB 3.0 data
Attach a keyboard, mouse, printer, webcam, microphone, flash drive or external storage to the four downstream ports. When the KVM switches hosts, those peripherals reconnect to the newly selected computer through its USB host cable.
All four downstream ports are labelled up to 5Gbps and carry USB data only. The USB-C port is not a laptop host connection, video output or Power Delivery charging port.
Practical limit: Some specialist gaming devices, encrypted storage, cameras and proprietary wireless receivers can behave differently after USB re-enumeration; test the peripheral workflow.
- Three downstream ports use USB-A connectors.
- One downstream port uses a USB-C connector.
- The four ports share the active host connection and available bandwidth.
- Safely eject storage before switching computers or removing the drive.
Use the top button or the supplied wired desktop controller.
Manual switching only
Press the round button on the KVM when the unit is within reach. If the cable bundle is behind or below the desk, connect the 1.5m controller and place its button near the keyboard.
this model does not support keyboard-hotkey switching or automatic source cycling. That deliberate limitation prevents legacy marketing copy from promising control methods the hardware does not provide.
Practical limit: No keyboard shortcut, software command or auto-scan mode is supported on SKU 55455.
- Top-panel button: direct manual switch.
- Wired controller: remote manual switch from the desk.
- Indicator lights identify the selected Computer 1 or Computer 2.
- Wake sleeping computers before switching and allow USB peripherals time to reconnect.
Use scenarios
Where it fits
The KVM suits dual-system desks where one person deliberately moves a complete two-monitor workspace between two computers.
Work and personal PCs. Use the same two monitors, keyboard, mouse and USB accessories with separate professional and personal computers.
Development and test. Switch a dual-screen desk between build and test systems without unplugging shared peripherals.
Windows and macOS desk. Share hardware across different operating systems when both computers provide the required dual HDMI and USB connections.
Creative workstation. Move monitors and USB storage or input devices together between editing and administration computers.
IT troubleshooting bench. Control two fully connected dual-display systems while keeping cables labelled and stationary.
Gaming and productivity. Share high-refresh compatible monitors and USB devices while accepting a manual button press between systems.
Setup and usability guidance
From box to working desk
Plan nine functional links before first use: three from each computer, two to the monitors and one DC power connection. The controller and shared peripherals are added on the front.
Troubleshooting shortcut: The setup artwork specifies two HDMI cables plus one USB-A cable from each host, a connected 12V/2A adapter and awake computers before switching. These are operating requirements, not optional accessories.
- Power off or safely pause the computers and monitors while making the initial cable layout.
- Connect Computer 1 HDMI A, HDMI B and USB data to the matching Computer 1 inputs.
- Connect Computer 2 HDMI A, HDMI B and USB data to the matching Computer 2 inputs.
- Connect KVM HDMI A output to Monitor A and HDMI B output to Monitor B with two suitable user-supplied HDMI cables.
- Connect the supplied 12V/2A DC adapter; the KVM requires external power for proper operation.
- Attach the wired desktop controller and shared USB peripherals, then power on the monitors and computers.
- Wake both computers, select the intended host and configure mirror or extend mode in that computer’s display settings.
- If video is missing, test one channel at a time and verify A-to-A and B-to-B mapping. If USB is missing, verify that host’s USB cable.
What this product does
Confirmed functions
- Switches two HDMI monitor outputs together between two computers.
- Switches three USB-A and one USB-C downstream data port with the selected computer.
- Supports listed video modes up to 4K@60Hz, subject to the complete signal chain.
- Allows mirror or extended two-monitor layouts configured by the selected computer.
- Provides manual switching from the top button or supplied wired controller.
- Includes four HDMI host cables, two USB host cables, the controller and required 12V/2A adapter.
- Keeps both monitor channels and all USB peripherals on the same selected host.
What this product does not do
Scope boundaries
- Does not show Computer 1 on one monitor and Computer 2 on the other.
- Does not create a second display signal from a computer that has only one.
- Does not accept DisplayPort connections without suitable active conversion.
- Does not support keyboard-hotkey switching or automatic source cycling.
- Does not make the front USB-C port a host, video or laptop-charging port.
- Does not include the two HDMI cables needed between the KVM outputs and the monitors.
- Does not guarantee 4K@60Hz or high-refresh output when a host, adapter, cable or monitor has a lower limit.
What to do
Reliable-use checklist
- Confirm both computers can drive two external displays and provide two HDMI outputs plus USB data.
- Label HDMI A and B cables and keep each channel matched from host input to monitor output.
- Connect the supplied 12V/2A adapter before operation.
- Use two appropriate monitor-output HDMI cables; for demanding modes follow the gallery’s 3m, 28AWG guidance.
- Wake both computers before switching and allow several seconds for video and USB devices to reconnect.
- Safely eject shared storage before changing the active computer.
- Test one monitor and one USB peripheral at a time when isolating a fault.
What not to do
Avoid preventable failures
- Do not buy this HDMI model for a DisplayPort-only installation without active conversion.
- Do not cross HDMI A and HDMI B channels.
- Do not operate the KVM without the required DC adapter.
- Do not expect hotkey or auto-scan switching.
- Do not use the front USB-C data port for laptop charging or display output.
- Do not switch hosts while shared storage is writing data.
- Do not assume a laptop dock can provide two independent displays without checking the laptop and dock specifications.
Warnings and limitations
Read before connecting
These constraints determine whether the product will work as expected and help protect active files, ports and cables.
- Each computer requires two independent HDMI video outputs plus one USB-A data connection.
- The KVM requires the included 12V/2A DC adapter for proper operation.
- Both monitors always follow one selected computer; matrix or split-source display is not supported.
- HDMI A input corresponds to HDMI A output and HDMI B input corresponds to HDMI B output; do not cross channels.
- The front USB-C port carries shared peripheral data only, not video, host input or laptop charging.
- Keyboard-hotkey and automatic switching are unsupported; use the product button or wired controller.
- UGREEN lists up to 4K@60Hz, 1440p@120Hz and 1080p@240Hz, but every host, adapter, cable and monitor must support the chosen mode.
- The gallery recommends output HDMI cables within 3m and 28AWG for reliable monitor operation.
- Safely eject USB storage before switching because peripherals disconnect and reconnect to a different host.
- Wake sleeping computers before switching; display and USB reconnection can take several seconds.
- Operating-system support does not guarantee every specialised peripheral, receiver, capture device or encrypted drive will re-enumerate identically.
- Use active, correctly directed conversion when adapting between HDMI and another video connector.
At a glance.
- Device or platform
- Compatibility guidance
- Desktop PCs with two HDMI outputs
- Direct fit when both HDMI outputs can run the intended two-display mode and a USB-A data port is available.
- Laptops with one HDMI plus USB-C video
- May work through a compatible active adapter or dock that exposes a second independent HDMI stream; confirm two-display support.
- Laptops with only one video stream
- Cannot create a second external display through the KVM; a compatible multi-display dock or different KVM architecture is required.
- Windows systems
- Listed by UGREEN; display layout and refresh modes depend on the GPU, ports, drivers and monitors.
- macOS systems
- Listed by UGREEN; model support, external-display count and any current software requirement should be checked for the Mac.
- Linux systems
- Listed by UGREEN; graphics, USB re-enumeration and peripheral support depend on distribution, kernel and drivers.
- Wireless keyboards and mice
- Usually connect through their USB receiver, but proprietary or specialised receivers should be tested.
- USB-C peripherals
- The front USB-C port supports data peripherals only, not USB-C host video or laptop charging.
- In the box
- 1 x UGREEN 55455 dual-monitor HDMI KVM switch
4 x HDMI 2.0 host cables, 1.5m each
2 x USB-A 3.0 host-data cables, 1.5m each
1 x wired desktop controller, 1.5m
1 x DC 5.5mm 12V/2A power adapter
1 x user manual
Check the signal path, not only the connector
UGREEN lists Windows, macOS and Linux systems. Hardware compatibility is more important than the operating-system name: each computer needs two independent HDMI-compatible display outputs and one USB-A data port.
Included items
Questions buyers ask.
What exactly does UGREEN 55455 switch?
It switches two HDMI monitor channels and four shared USB data ports together between two connected computers, with one computer active at a time.
What connections are required from each computer?
Two independent HDMI outputs and one USB-A data port. Connect two HDMI cables plus one USB host cable from each computer to its matching input group.
Can one monitor show Computer 1 while the other shows Computer 2?
No. Both monitor outputs and all shared USB peripherals always follow the same selected computer.
Can the KVM create two monitors from one HDMI output?
No. Each computer must already provide two independent display signals. A compatible dock or active adapter may be needed for a laptop, and the laptop must support two external displays.
Does it support 4K at 60Hz?
UGREEN lists up to 4K@60Hz. Both computers, adapters, all HDMI cables and both monitors must support the selected mode.
What other refresh-rate modes are listed?
UGREEN lists 2560 x 1440 at 120Hz and 1920 x 1080 at 240Hz in addition to 4K@60Hz and 4K@30Hz.
How many shared USB ports are there?
Four: three USB-A 3.0 and one USB-C 3.0 downstream data port, rated up to 5Gbps.
Can the front USB-C port charge a laptop or output video?
No. It is a shared data-peripheral port only. It is not a USB-C host, Power Delivery port or display output.
How do I switch between computers?
Press the button on top of the KVM or use the supplied 1.5m wired desktop controller.
Does model 55455 support keyboard hotkeys or auto-scan?
Is the power adapter required and what rating is it?
Yes. Connect the included 12V/2A DC adapter for proper operation.
Are all six HDMI cables included?
Four 1.5m HDMI host cables are included for the two computers. Supply two additional suitable HDMI cables from the KVM outputs to the monitors.