Skip to: | - A great place to buy computers, computer parts, electronics, software, accessories, and DVDs online. With great prices, fast shipping, and top-rated customer service - once you know, you Newegg.

If you are reading this message, Please click this link to reload this page.(Do not use your browser's "Refresh" button). Please email us if you're running the latest version of your browser and you still see this message. - Computer Parts, Laptops, Electronics, HDTVs, Digital Cameras and More!

  • Wish List
  • Feedback
  • Help
Search all

StarTech HDMI Over Cat5/Cat6 Extender with IR - 100 ft (30m) Power Free ST121SHD30

  • Supports Cat5e and Cat6 Ethernet cabling
  • HD Res. up to 1080p (1920x1080)
  • No software/drivers required
  • Email this page
ICON Loading...

The StarTech ST121SHD30 HDMI extender is an economical and easy-to-use solution that extends an HDMI audio/video signal up to 100 feet (30 Meters) over a dual Cat5e or Cat6 cable. You can use your existing or new Ethernet infrastructure wiring, without the need of an expensive HDMI cable. It supports high-definition resolutions of up to 1920x1080p, and the accompanying multi-channel digital audio maintains A/V quality after extension. Including a transmitter and a receiver, this kit also supports infrared signal extension, and can be powered via the HDMI bus offering great placement flexibility. The extender kit is perfect for point-to-point digital signage applications that require high-quality HDMI video, or industrial environments where a display is installed in a convenient viewing area, while the system equipment is kept in a clean, secured environment.

For additional distance, HDMI cables up to 32 feet (10 meters) in length can be used on the local and remote ends.

Note: The extender does not work through Ethernet equipment, such as switches or routers.

  • newegg Superior A/V Quality Supports high resolutions of up to 1920x1080 / 1080p and the accompanying digital audio for superior video/audio quality.
  • newegg Power over Cable This kit features Power over cable, allowing both the Transmitter and Receiver to be powered from the HDMI video source. No power adapter is required, great for areas where access to outlets is limited.
  • newegg IR Extension The transmitter and receiver have an IR Channel jack each for IR extension, perfect for controlling your video source from your video destination.

Learn more about the STARTECH ST121SHD30




Maximum: 50 m/165 ft
Resolution Support
Maximum: 1080p/1920x1080


LED Indicator
1 x Input
1 x Output


Cabling: Cat 5 UTP or better
Ports: 1
Daisy-Chain: No

Local Unit Connectors
1 x HDMI (19 pin) Female
2 x RJ-45 Female

Remote Unit Connectors
2 x HDMI (19 pin) Female
2 x RJ-45 Female

Wide Screen Supported: Yes

Color: Black
Enclosure Type: Aluminum

Humidity: 0% - 80 %
Operating Temperature: 0 C to 40 C (32 F to 104 F)
Storage Temperature: -10 C to 60 C (14 F to 115 F)


Supports Cat5e and Cat6 Ethernet cabling

Power over HDMI

No software/drivers required

Supports HD resolutions up to 1080p (1920x1080)

Includes transmitter (local) and receiver (remote) units


3.2"(L) x 1.8"(W) x 0.9"(H)
0.5 lbs.


Package Content
HDMI over CAT5e/6 UTP Transmitter
HDMI over CAT5e/6 UTP Receiver
Foot Pad Set
User Manual
IR Extender Kit

Quick Info


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years

Customer Reviews of the STARTECH ST121SHD30

Do you own this product? Write a Review

ICON Loading...

Filter Results

  • Cesar D.
  • 7/6/2014 7:56:13 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsThey work...with my laptop only

Pros: Cheap and high quality
2 Year Warranty
Plug and Play right away
Any computer will still be able to pick up the TV info as if it were hooked up with a straight HDMI cable. Sound works too.

Cons: Be sure to check the power coming in from the source. If it is too low, the output receiver will glow dim. If it does, you need the more expensive active powered version of this unit (The 165' ST121SHD50).

Other Thoughts: We bought these with the intent of extending HDMI to several outdoor TVs because they were outside the safety range of HDMI cables with repeaters, over 50'. We were direct cabling these from the cable box. The Cable box does not deliver enough power to drive these units. You can tell because my laptop is able to display to the TVs outside without any problems. However, this means I need to buy the more expensive powered active version. It was my mistake to not consider the signal power out on the HDMI from the cable box.

Did you find this review helpful? Yes No

  • Francis G.
  • 5/15/2014 11:21:38 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWorks Great

Pros: This thing works great. I was able to setup my security camera system in the closet and I ran the 2 cat 6 cables to my 47 in hd tv to view my security cameras.

Cons: NONE. I dont see how James C. took this for something else. He did not know what he was doing at all.

Other Thoughts: This works great right out the box. Its nice to be able to view my security cameras in another room now on my tv.

2 out of 2 people found this review helpful. Did you? Yes No

  • Anonymous
  • 2/21/2014 10:07:22 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month

5 out of 5 eggsWorks perfectly.

Pros: This delivers perfect video and audio over cables that are 100 feet long. I use it run video from a PC to a monitor in another room.

Cons: None. The other guy that gave this a poor review clearly had no idea how this product works. There's nothing wrong with it.

5 out of 5 people found this review helpful. Did you? Yes No

  • James C.
  • 2/17/2014 10:37:06 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsKnow what you are buying

Pros: It may do what it says and extend your video 100 ft.


Other Thoughts: I found this useless as I was trying to use my existing network to extend the video.

0 out of 12 people found this review helpful. Did you? Yes No

Compare Offers from All Sellers

Seller Name & Rating Offer Details  
ICON Loading...

More Buying Options

Are you an E-Blast Insider? Subscribe Newegg e-Blast
Shop without retyping payment details. Secure shopping made faster.
Check out with PayPal.

Related Products
Tripp Lite B126 2X2 Video/audio extender up to ...
The Avenview HDMI C5 3X SET, HDMI 1.3a ...
General Brand C2G Model 29226 Housing Metal Performance ...
General Brand StarTech Model ST121WHD Specification Specification Cabling: ...
Shop by Region: United States | Canada | China | Taiwan
VeriSign Click for the BBB Business Review of this Computers - Supplies & Parts in Whittier CAThis site protected by Trustwave's Trusted Commerce program Inc500
Policy & Agreement | Privacy Policy  © 2000-2015 Newegg Inc.  All rights reserved.
If the Adobe Reader does not appear when you click on a link for a PDF file, you can download Adobe Reader from the Adobe web site.