4-Port, 4K (UHD) Dual-Monitor DisplayPort-to-HDMI KVM Switch with USB Hub


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Video Type: DisplayPort to HDMI
Monitors: Dual Monitor
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The SM-D2H-4D-S (formerly the D2H-4P-Duo) is a dedicated multi-platform KVM switch capable of managing four 4K computers through a single, central workstation. Built with two ultra-HD ready HDMI outputs, the SM-D2H-4D is the first Displayport switch on the market to offer full video emulation directly from the device. Up until now, DisplayPort switches lost emulated picture when disconnected from monitors, leading to confusion and disorganization upon reconnecting. With SM-D2H-4D, full EDID-assisted HDMI video emulation ensures visual workspaces and screen resolutions are remembered every time: simple!

The SM-D2H-4D is DisplayPort 1.2 and HDMI compliant, supporting screen resolutions up to 4K Ultra-HD (3840x2160 @ 30Hz) for remarkable and responsive video emulation. Additionally, the SM-D2H-4D is USB peripheral-friendly, compatible with printers, keyboards, and mice. The SM-D2H-4D is also easy to control with both a simple front-panel interface, as well as RS-232 functionality.

SM-D2H-4D-S Application
D2H-4P Rear

SM-D2H-4D-S Features & Benefits

  • Full EDID video emulation via HDMI output
  • KVM control between four connected computers from a single workstation
  • Supports resolutions up to 4K (3840x2160 @30Hz)
  • DisplayPort 1.2 and HDMI compliant
  • Zero pixel loss with TMDS signal correction
  • Supports all USB 2.0 devices, including keyboard and mouse
  • Supports Windows, Mac and Linux
  • Optionally rack mountable
  • Hot key commands for quick channel selection
  • Independent (asynchronous) switching of KVM and peripheral USB ports; users can scan a document and save in another computer
  • Complete KVM emulation for error free booting
  • Front panel keys for manual switching
  • Full HDMI support and backwards compatible with prior DisplayPort versions


The SM-D2H-4D offers simplified management between four DisplayPort equipped computers' USB 2.0 outputs. Keyboards, mice, and other connected USB devices can be switched between with ease. This dynamic KVM console can be controlled via hot keys or RS-232 commands, as well as directly through the console's easy-to-read front panel.


The SM-D2H-4D features EDID Pass-Through technology and source recognition, which enables smooth and efficient switching in virtually any scenario. This plug-and-play EDID functionality makes set up hassle free and simple.


The USB keyboard and mouse emulation utilized by SM-D2H-4D provides quick source switching via keyboard hot keys. SM-D2H-4D simulates the presence of a keyboard and mouse for every attached computer through a USB cable. This essential function simulates keyboard, video, and mouse control for all connected computers, so switching between each is kept seamless and completely uninterrupted.


The SM-D2H-4D has a broad range of applications, but the main function is to centralize the access of up to four computers that support DisplayPort displays in a single workstation. Not only does it function as a KVM console, but it also supports USB 2.0 functionality. This allows users to access nearby USB device, including those not supported by other KVM switches. The SM-D2H-4D is the ideal solution for medical, industrial, studio and defense applications, where it is not practical or safe to have multiple CPUs in the vicinity of the workstation.

  • Server hubs
  • Retail spaces
  • Educational facilities
  • Airports
  • Dealer rooms
  • Hospitals and medical offices
  • Control rooms
  • Audio/Video Presentation Spaces
  • Hotels and Resorts


USB/KEYBOARD: Hot keys enable the user to switch and control all the different functions of the KVM switch.

RS-232: Any external device or program supporting RS-232 can control the SM-D2H-4D The SM-D2H-4D-S uses a very simple protocol that enables easy integration with other devices.


INDEPENDENT SIMULTANEOUS DEVICE SELECTION: Flexibility is key with the SM-D2H-4D. It enables the use of a USB keyboard and mouse of one computer while other USB peripherals such as scanners and printers are connected to other computer sources. SM-D2H-4D maintains the ability to switch all connected devices to any one of the computer sources as with any other KVM switches.

SM-D2H-4D-S Package Includes

SmartAVI SM-D2H-4D-S Package Contents

  • (1) D2H-4P-Duo 4-Port Dual DP In / HDMI Out KVM
  • (1) PS5VDC4A Power Supply
  • (1) Quick Installation and User Guide

SmartAVI SM-D2H-4D-S Specifications

FormatDisplayPort 1.2, HDMI
Link Rate5.4 Gbps/lane
Input Interface(4) DisplayPort (female)
Output Interface(2) HDMI (female)
ResolutionUp to 3840x2160 (@30Hz)
DDCFaux transaction mode option over Aux channel
Input EqualizationAutomatic
Bandwidth Frequency10.2Gbps
Signal TypeUSB 2.0, 1.1, and 1.0 w/ internal hub
Input Interface(4) USB Type B (female)
Output Interface(2) USB 1.1 Type A (female) for keyboard and mouse

(2) USB 2.0 Type A Transparent (peripheral hub)
Front PanelTactile Switches, with Seven Segment Display
Serial RS-232Via Control @ 9600 bps
Hot KeysVia Keyboard
EmulationKeyboard, Video and Mouse
PowerExternal 100-240 VAC/ 5VDC4A @ 20W
Consumption20 W (Max)
Dimensions1.75" H x 6" D x 12" W
Weight3.5 lbs
ApprovalsUL, CE, ROHS Compliant
Operating Temp.-5 to +35°C (+23 to +95°F)
Storage Temp.-4-185°F (-20-85°C)
Humidity5 to 90% (No Condensation)

The SmartAVI SM-D2H-4D-S is the compete system and was formerly known as the D2H-4P-Duo or D2H-4P-Duo-S

UPC / EAN Barcode icon
UPC 657477054946
EAN 0657477054946
Question: Does this support having one DisplayPort input drive both HDMI outputs, or does the input have to use both ports?
Answer: Thank you for your inquiry,

The SmartAVI D2H-4P-Duo would need both DisplayPort inputs plugged in for dual monitor support - It does not support DisplayPort Multi-Stream-Transport (MST). Currently (10/18/2016), the only DP KVM that I am aware of that supports MST is the 2-Port Aten CS782DP.

If you have any questions about MST, or would like a recommendation based on your application, please feel free to contact your KVM Switches Online sales representative directly.

Question: What is in the package? Are all the cables included?
Answer: Thank you for your inquiry,

SmartAVI D2H-4P-Duo-S package contents:
  • 1x D2H-4P-Duo KVM Switch
  • 1x PS5VDC4A Power supply
For greatest flexibility, the cables are not included. See below for cables you may need:

Question: I thought HDMI was limited to 2560 x 1600 resolutions. Does this KVM actually provide 3840 x 2160?
Answer: Thank you for your inquiry,

HDMI version 1.4, which features a bandwidth of up to 10.2Gbps, introduced the ability to deliver 4K video of 3840x2160 @30Hz. This SmartAVI D2H-4P-Duo is indeed able to provide 3840 x 2160 (30fps).

HDMI version 2.0, which features a bandwidth of up to 18Gbps, introduced the ability to deliver full 4K video of 3840x2160 @60Hz. You may also be interested in the SmartAVI UHDN-4P-DUO HDMI to HDMI KVM switch which can provide 3840 x 2160 (60fps).

Please let us know if there is anything else we can help you with!

Question: How does it support audio?
Answer: Thank you for your inquiry,

The SmartAVI D2H-4P-Duo supports stereo audio sharing over a separate 3.5mm audio connector; Each of the 4 source inputs has a 3.5mm stereo audio port that you can plug in an audio source to, and the user console section also has a 3.5mm stereo audio port for output.

Please let us know if there is anything else we can help you with!

Question: The picture does not match the picture in the referenced manual. The manual shows audio ports on the back but the picture here does not show any audio ports.
Answer: The new versions of the D2H series including this D2H-4P-Duo do indeed have audio ports on the back. We have updated the images on this page to reflect that feature.

Thank you for your feedback! Please let us know if there is anything else we can help you with!