Question 1

Does this support uhd 4k, ie: 3840x2160/30p ?  another kvm i bought that claimed 4k support only supports 1080p/1080p 3d ...

Accepted Answer

Keep in mind that the video card and the monitor has to support 3840 x 2160 4K resolution 
I have mine connected and I get 2560 x 1440 which is the max resolution that my monitor supports. Check your video display settings in your computer to find out what is the recommended setting that windows found for your display.

Question 2

Does the switch “proxy” edid information when the host isn’t selected to talk directly to the monitor?

Accepted Answer

Its supposed to, but I have not found this magical 1080p/auto edid button that the manual keeps mentioning.  So my lg ultrawide is stuck on 1080p for all 4 of my pc.

Question 3

Will this work with a microsoft surface pro? does it come with the cables i will need?

Accepted Answer

NO - you would have to purchase more.  All Surface Pro's only have 1x USB port and 1x mini-Display Port (not HDMI).  You would have to purchase a mini-DP to HDMI video adapter (less than $10) to use it with this switch.
Microsoft does sell a port replicator (~$150), but it also only has mini-DP video ports (so it does NOT help you to buy that).  "Orion" said "Micro Surface Dock" could plug into this KVM,  but only "later" said that you still need a video adapter.
If you need this HDMI KVM switch, the easiest/best/cheapest thing to do would be to buy a simple "mini-DP to HDMI" video adapter and plug the (now HDMI) and USB into this KVM switch.

Question 4

Is there a published instruction manual? I cannot seem to switch from windows 10, raspberian, or ubuntu. What are the keyboard and mouse commands?

Accepted Answer

A user manual should have come with the unit which gives keyboard hot-key switching codes. Double clicking the mouse scroll wheel should step you through the ports. You can also use the manual button for switching toa port.

ASIN	B07HRBBLWN
Actuator Type	Push Button
Best Sellers Rank	#298 in KVM Switches
Brand Name	CKLau
Circuit Type	4-way
Color	4 Port USB 2.0 HDMI
Compatible Devices	Windows 7/8/10/XP/Vista, Mac systems, Desktops, PS4, Game consoles, TV boxes, Apple TV, Android TV box
Connectivity Protocol	Hdmi
Connector Type	Plug In
Contact Material	Metal
Contact Type	Normally Open
Control Method	Remote
Control Type	Multi-Input Source Control
Controller Type	Android, Push Button
Current Rating	2 A
Customer Reviews	3.9 3.9 out of 5 stars (905)
Global Trade Identification Number	06957737960715
International Protection Rating	IP54
Item Dimensions	8.07 x 2.95 x 0.98 inches
Item Weight	1 pounds
Manufacturer	CKLAU TECHNOLOGIES INC.
Material Type	Metal
Model	CKLau-64Hua
Mounting Type	Surface Mount, wall mount
Number of Items	1
Number of Positions	4
Operating Voltage	5 volts
Operation Mode	ON-OFF-ON
Part Number	CKL-64HUA
Specification Met	Ip54
Switch Type	Kvm Switch
Terminal	Usb + Hdmi
Unit Count	1 Count

KVM Switch HDMI 4 Port wit Audio and 4 kit Cables, 4 Port HDMI KVM Switch Support 4K@60Hz 4:4:4, EDID, Hotkey Switching

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