Alfatron WU4K HUB


The ALF-WU4K HUB HDMI 2.0 is a 4×1 Switcher. The switcher features four HDMI video inputs and one HDMI output. It supports HDMI video resolution up to 4Kx2K@60Hz 4:4:4 HDR 10. The switcher provides one stereo audio output for audio de-embedding and provides four Type-B USB ports and three type-A USB ports for KVM management, the four HDMI computers can be controlled via one keyboard, one mouse and one monitor. In addition, the switcher features four GR ports to connect ALF-TG table grommets for source selection and black screen settings. The switcher can also be controlled via RS232 and front panel buttons.

Product Features

  • 4×1 HDMI 2.0 Switcher with KVM
  • Supports video resolution up to 4Kx2K@60Hz 4:4:4, HDR 10
  • HDCP 2.2 compliant
  • Compatible with Windows, Linux and Mac OS
  • 3.5mm stereo audio output for audio de-embedding
  • Convenient and cost-effective USB 3.0 peripheral sharing
  • Controls four HDMI computers via one keyboard, one mouse, and one monitor
  • KVM auto-switching based on TMDS/5V detection
  • Controllable via buttons, RS232 commands and ALF-TG table grommets
  • Simplifies wiring for easy installation



Additional information

HDMI Input Ports



Video Input 
Input  (4) HDMI 
Input Connector  (4) Female type-A HDMI 
HDMI Input Resolution  Up to 4Kx2K@60Hz 4:4:4 
HDMI Standard  2.0 
HDCP Version  2.2 
Video Output 
Output  (1) HDMI 
Output Connector  (1) Female type-A HDMI 
HDMI Output Resolution  Up to 4Kx2K@60Hz 4:4:4 
HDMI Standard  2.0 
HDCP Version  2.2 
Output  (1) AUDIO 
Output Connector  (1) 3.5mm mini stereo audio jack 
Audio Format  PCM 
Audio Output Impedance  70 Ohms 
Frequency Response  20Hz to 20kHz, ±3dB 
Control  (1) IR IN; (1) RS232 
Control Connector  (2) 3.5mm mini jack 
Bandwidth  18Gbps 
Operation Temperature  -10~ +55 
Storage Temperature  -25~ +70 
Relative Humility  10%-90% 
Power Supply  Input:100V~240V AC; Output: 5V DC 1A 
Power Consumption  5W(Max) 
Dimension (W*H*D)  194mm x 15mm x 81mm 
Net Weight  324g 



Technical Sheet

User Manual

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Download Image

Optional Accessory

The Alfatron ALF-TG table grommet is an accessory to the Alfatron ALF-WU4K Switcher. The switcher has GR connection ports where you can connect up to four grommets. This allows for remote source selection and a black screen from the table. It has an HDMI input and a USB-B connection port.

User Manual


1. Q – What is the ALF-WU4K?

   A – It is a 4×1 HDMI with USB ports for KVM management switcher.

2. Q – How is the device controlled?

    A – Via the front panel buttons, RS232 and via the optional ALF-TG Table Grommets.

3. Q – Its the device only useable with Windows PCs?

   A – The ALF-WU4K is compatible with Windows, Linux and Mac OS.

4. Q – What is the maximum output resolution?

   A – 4Kx2K@60Hz 4:4:4, HDR10

5. Q – Does the device detect inputs automatically or do I need to select the source via the front panel buttons?

 A – The unit has the option to enable auto-switching via the front panel.