TRENDnet 4-Port USB KVM Switch and Cable Kit with Audio, TK-409K
TRENDnet 4-Port USB KVM Switch and Cable Kit with Audio, TK-409K
TRENDnet 4-Port USB KVM Switch and Cable Kit with Audio, TK-409K
TRENDnet 4-Port USB KVM Switch and Cable Kit with Audio, TK-409K

TRENDnet 4-Port USB KVM Switch and Cable Kit with Audio, TK-409K

  • Customer reviews(1020)
$18.89*Sale Price
Size:2 Port


:DVI|Dual Monitor


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  • 4-port KVM switch with VGA and USB connections to computers and audio devices
  • Listen to music from one computer while working on the other
  • High quality 2048 x 1536 resolution for a crisp display
  • Supports most operating systems and advance mouse designs
  • All required cabling included

The 4-Port USB KVM Switch with Audio lets you manage 4 computers with just one set of keyboard, monitor, mouse, and a set of speakers / microphone. The device comes with 4 sets of USB KVM and audio cables, no additional equipment required. Its compact size makes it ideal for home and business environment.

-Control up to 2 computers/servers with one set of console device
-USB keyboard/mouse emulation with 2 sets of detachable KVM cables
-Compliant with Windows and Linux
-High video quality, up to 2048 x 1536 VGA resolution
- Multi-Platform supports for PCs, Macintosh G3/G4/G5, iMac and Mac Mini
- Listen to music from one computer while working on the other
- Auto-Scan & LED display for computer monitoring
- Computer selection by face panel push buttons, keyboard hot key commands or Windows-based client switching software
- User definable hot key (Windows only)
-Plug & Play and hot-pluggable
-USB interface power method
-2-year Manufacturer’s Warranty

Package Contents:
- TK-409K
- Quick Installation Guide
- 4 sets of USB KVM cables (2 x 1.2 m / 4 ft., 2 x 1.8 m / 6 ft.)
- 4 sets of audio cables (2 x 1.2 m / 4 ft., 2 x 1.8 m / 6 ft.)



Customer reviews(1020)

  • Jack2u
  • September 2, 2017
  • This is my 3rd device in as many years. The only reason I purchased it again was that I already had all the cables dressed and tie wrapped in place. The third time is a charm as they say. So when this one fails as they never last more than a year, I will re wire and get a KVM from a different manufacturer! They always fail the same way, the mouse and keyboard do not connect.
    While they work, they work very well, however, it gets expensive to keep changing them.
    If by any chance the manufacturer reads this and wants me to send them a failed unit to evaluate the failed component, I will be happy to.
  • ktMcD
  • March 22, 2019
  • This model is identical to one under the brand name "Star Tech". I don't recommend spending a lot on these. I've owned this model under both brand names and am disgusted with myself for purchasing the second one (TRENDnet) thinking it might be better. What a maroon I am.

    I am a remote employee and so need a KVM for a dual monitor setup - work laptop and home desktop. I use USB keyboard and mouse and DVI monitors. Pretty basic and not even the hottest technology. Still, though, I have never been able to get my usb devices working with these. I use an external usb switch for the usb devices I want to share between boxes. What a pain. It's doable, but if you can find something else to use and can afford the cost, buy that. Don't buy this. It's only slightly better than junk. I would recommend going for the ones that are designed for use with servers. They're more expensive, but at least you know you'll get post-sale service and that they'll last.
  • Mark Twain
  • October 31, 2016
  • Works with no problem with Windows 7 and Linux, will have a Mac hooked up in a couple days.

    It would be nice if the keyboard switch worked in something other than Windows, but I can still push the buttons. The cables having a single USB plug on the end is nice.

    A BIG plus is on my Linux system. With my former switch (IOGear 2-port) the monitor would work for maybe 30 seconds after switching to the Linux machine, then it would go black for a while, repeat twice and then be ok. It would also lose the screen resolution.

    I see none of that with this switch, so far in a small number of tests the monitor remains at the same resolution and switches on right away. No long pause, no blinking.
  • Daniel
  • July 24, 2017
  • This KVM works but has loads of quirks.

    I purchased the 4 port VGA w/ Audio. I have it setup with 3 computers (OSX, Windows, and Linux).

    Unfortunately the audio is useless due to noise interference. When hooking up speakers to the KVM there is a very annoying background noise that makes it impossible to work unless you're playing music loud enough not to notice it. Additionally the noise changes in pitch when you move the mouse. So do not buy this if you need the audio and don't want to go crazy.

    The USB switching works OK. The switch time can be rather slow sometimes (5-7s) and in the worst case, occasionally it just refuses to switch to a machine unless you unplug all the other machines. Yeah, it sucks, but usually that doesn't happen.

    Lastly, it has this annoying feature where tapping Numlock twice switches inputs, and it can't be turned off! If you work with virtual machines, then simply switching between the VM and the host will trigger this unless their numlock status matches. This might not be an issue for most people but it's annoying as hell if you use a VM. There doesn't seem to be anyway to turn this feature off.

    Thankfully it still works pretty well as a USB/display KVM. If I had to buy another one, I'd try another model for sure.
  • Linda G.
  • May 30, 2014
  • I purchased this some time ago and failed to write a review. I needed a kvm to reduce some of the clutter on my desk. I have more electronics than any one person should have. I had used several other brands of kvm but none of them have performed as good as this one. Perfect switching every time. The only thing that Trendnet could do to improve on this one is to equip it with Dynasync. I had a little frustration dealing with the fact that sometimes in switching the resolution of the display would drop to its lowest resolution and I would have to reboot the computer. After a little searching I figured out how to make the switch retain the native resolution of my monitor when switching back and forth between computers. The following is how to do it. I hope it will help someone else having the same problem. This solution should work with any brand kvm.

    If you use a KVM to share your monitor, mouse, and keyboard between computers and are having problems with your display reverting back to low resolution every time you switch your KVM then this posting is for you. Here's what you do to keep this from happening. Be sure to export your current registry keys before making any changes so you can easily go back to your original setting if need be.

    First, go into your power options. Turn off sleep, hybrid sleep, and hibernate. If you have a screensaver get rid of it. If you don't know how to change any of these options google how to do it in your particular operating system. Each version of Windows is different so I can't list instructions for each of them here.

    Next, open regedit. Browse to HKey_Local_MachineSystemCurrentControlSetControlGraphicsDriversConfiguration
    Locate the key for your monitor. Normally the first few characters will match your vendor. In my case, I use a Viewsonic display, and my key starts out with VSCE********
    Expand this key and both of the 00 subkeys. Under the first 00 subkey, document the values for PrimSurfSize.cx, PrimSurfSize.cy, and Stride. Then go to the nested 00 subkey and document the values for ActiveSize.cx and ActiveSize.cy.

    Next, locate the key starting with SIMILATED. Modify the values within this key to match the values you noted in the previous step.
    If the keys do not exit add them.
    Then locate the key starting with KVM and modify its values the same way.

    This should fix your problem. Your resolution should remain at your monitor's native setting.