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CDN$ 75.58 + CDN$ 5.10 shipping
In Stock. Sold by Memory house

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CDN$ 90.93
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Diamond Multimedia USB 3.0/2.0 to HDMI/DVI Mini Ultra Dock with Dual Head Multiple Display Monitors (MDS3900)

Price: CDN$ 75.58
Only 8 left in stock.
Ships from and sold by Memory house.
6 new from CDN$ 75.58
  • Connectors: HDMI, DVI (with included adapter), USB 3.0 Micro, RJ-45 Gigabyte Ethernet
  • Chipset: DisplayLink DL-3500
  • Number of Displays Supported: 2 per MDS3900 adapter. Maximum per system, 3 adapters total monitors supported is 6 displays.
  • Max resolution: 2560 x 1600, 2048 x 1152 and 1080P
  • HDCP: Yes, Protected video playback HDCP 2.0

Product Details

  • Product Dimensions: 8.9 x 1.8 x 6.4 cm ; 68 g
  • Shipping Weight: 113 g
  • Item model number: MDS3900
  • ASIN: B00K85XUR2
  • Date first available at July 12 2014
  • Amazon Bestsellers Rank: #343,497 in Electronics (See Top 100 in Electronics)
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Product Description

Diamond MSD3900
Diamond MSD3900
Diamond Multimedia USB 3.0/2.0 to HDMI/DVI Mini Ultra Dock with Gigabit Ethernet

The Diamond MDS3900 USB 3.0 to HDMI/VGA mini Ultra Docking station allows easy plug and play installation for multiple displays/monitors.

Quickly and Easily Add Multiple Displays

Enhance your laptop’s visual experience by adding 2, 3 or up to 6 displays in minutes. Each Display requires an additional MDS3900 adapter, each adapter supports dual head video output, support for HDMI and DVI/VGA simultaneously.

Gigabit Ethernet support, upgrade or add Ethernet wired connectivity to you laptop, Macbook, and Ultradock with one single USB connection.


The Diamond MDS3900 is compatible with Microsoft Windows 8, Windows 7, Windows Vista, Windows XP, and Apple Mac OS, OSX10.6 and higher

Diamond MSD3900
Easy plug and play installation for multiple displays/monitors.

What's in the Box
  • MDS3900 USB 3.0 Mini Ultra Dock Display
  • USB 3.0 Micro Cable
  • DVI to VGA dongle
  • RJ-45 Ethernet Cable
  • Quick Installation Guide
  • Installation CD

Customer Reviews

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Most Helpful Customer Reviews on (beta) 4 reviews
3 of 3 people found the following review helpful
By J. Livingston - Published on
Verified Purchase
Despite seeing support for 2560x1440 on and the Diamond Multimedia product page for MDS3900, this product will not support 2560x1440. Oddly, when I received the box in the mail, every place on the box that showed "2560x1440" was covered by a sticker with "2048x1152". I finally called customer support after troubleshooting with various HDMI and DVI cables, updating the DisplayLink software, and rebooting my computer among other things.

Customer service did not have any clues about the sticker, and simply said it would only support 2048x1152 and that this was clearly stated on their website. This is not the case if you click on the Features tab for the product page where it clearly says "Max resolution 2560 x 1600, 2048 x 1152 and 1080P". While they indicated I must be on an old web page, when I cleared my cache and did a product search on, I still get the same product page and see the same thing. The product page also indicates that it is managed by Diamond Multimedia and not some 3rd party.

They are clearly falsely advertising this product, so I would be weary of any other claims they make about this product and any others.

Diamond MDS3900 - Click Features tab to see the claim of 2560.
1 of 1 people found the following review helpful
Watch out - not really USB3 / SuperSpeed performance! Dec 23 2014
By Brian - Published on
In trying out this product I felt like I was getting lower performance than what I would expect from reading other reviews on similar DisplayLink products. I'm not sure if this is the cause or not but in looking over the configuration I found on 3 separate systems that it was only detecting this as a Hi-Speed (USB2.0) device instead of a SuperSpeed (USB3) device. I confirmed this multiple times and all 3 systems limited it to hi-speed 480Mb/s. In my opinion that also makes the Gigabit Ethernet pretty much useless as you'd be limited to 480Mb instead of 1Gb and you have to share that bandwidth with the video streams.

I'd have to agree with the previous review that I felt like this was falsely advertised. Its been a long time since I've bought a Diamond product but I remember them being better. What happened?
1 of 1 people found the following review helpful
Do not but this product. The quality is bad. Find another company or buy cheap chinese its not worth the extra money. I March 5 2015
By Jack Fogelson - Published on
Verified Purchase
Do not purchase this product!!! The first one was dead. They sent me another it lasted 6 months. Amazon will not take this back and diamond will not advance a return. First one monitor failed, then a few weeks later the second. I can not do my work without a second display and cant wait the week two weeks to get this back from them. nI don't trust they will retunr a working product. The tech said they don't make the software so there isn't much he can do. I wasted a lot of time problem solving this.
Awesome and affordable solution to a long time problem! Oct. 13 2014
By Rod - Published on
Verified Purchase
I love it. My computer only has USB2.0 but still powers 2 monitors fine (note that i'm not using for gaming, but rather internet windows and data entry windows.

Also, note that my computer is 2011 Macbook pro - with registered windows 7 dual boot and mac osx ... when running in windows i have 3 external monitors (2 connected through this Diamond product and one through my Thunderbolt port) and the laptop monitor so 4 total .. and it works great. However, when in Mac OSX I have noticed that the USB monitors arent being recognized ... probably driver issues or something, i really havent had time to troubleshoot it yet, but i'm sure it is a somewhat simple fix (hoping)

Had it just plug-n-played and worked fine on both platforms immediate id give it a full 5 star. ONLY reason for 4 is that i'll have to tinker a tiny bit to get it to work on mac it appears.