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 ST121UTPHD2 HDMI over Cat5 Video Extender with RS232 and IR Control

  • HDMI over Cat5 Interface

  • Pin It
  • Email this page
ICON Loading...
  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The ST121UTPHD2 HDMI over Cat5 Extender Kit extends the audio and video signal output from an HDMI-equipped device by up to 330 feet (100 meters) over a single CAT5 cable, or up to 165 feet (50 meters) over a single CAT6 cable. The extender supports full high-definition video (1080p) and HD 3D, and also extends the accompanying digital audio signal. It offers bi-directional RS232 serial and Infrared (IR) interfaces, which enable you to control the HDMI audio-video source from either end of the connection for convenient, time-saving control of the media source.

The HDMI over CAT5 Extender Kit includes both the HDMI to CAT5 transmitter, and the needed Cat5 to HDMI receiver, for a cost-effective, ready-to-use digital signage solution.

To help ensure seamless performance without any unexpected or unnecessary interruptions, the HDMI Ethernet transmitter and receiver units are fully compliant with high-speed HDMI and HDCP standards, and each unit features lockable power connectors to prevent accidental disconnections.

  • newegg Control the HDMI Audio-Video Source from Either End of the Connection Integrated bi-directional RS232 and IR interfaces enable you to communicate with, monitor, and control your source audio-video device, from either end of the connection.
  • newegg Excellent Image and Sound Quality With support for full 1080p resolution and accompanying digital audio, the ST121UTPHD2 lets you display your content the way it's meant to be seen and heard.

Learn more about the STARTECH ST121UTPHD2




Extender & Repeater Type
Non Wall Plate Extender


100 m / 330 ft.
Resolution Support
1080p @ 60Hz, 48-bit
Supports Dolby TrueHD, DTS-HD MA


LED Indicator
1 - HDCP (Green)
1 - Mode (Green)
1 - Power (Green)
1 - RJ45 Link (Green)


System Requirements
1X Standard CAT5 cable
1X HDMI Cable for Remote Unit (Local Cable Included)


Power Supply
Center Tip Polarity: Positive
Input Current: 0.6
Input Voltage: 110 ~ 240 AC
Plug Type: M
Power Adapter Included: Two
Output Voltage: 12 DC
Output Current; 1.24A


Cabling: Cat 5 UTP or better
Audio: Yes
Industry Standards: High Speed HDMI and HDCP compliant
Daisy-Chain: No

Local Unit Connectors: 1 - IrDA (Infrared; SIR/FIR)
Remote Unit Connectors: 2 - IrDA (Infrared; SIR/FIR)
Local Unit Connectors
1 - DB-9 (9 pin; D-Sub) Female
1 - RJ-45 Female
2 - HDMI (19 pin) Female
Remote Unit Connectors
1 - DB-9 (9 pin; D-Sub) Male
1 - HDMI (19 pin) Female
1 - RJ-45 Female

Maximum Data Transfer Rate:
HDMI - 3.4Gbps
RS232 - 115200bps baud

IR Interface
38Khz / +/-10 degree / 5M

Color: Black
Enclosure Type: Steel


Extends HDMI or DVI video (with adapter) with the accompanying device control signal and audio stream (where applicable), over a single Cat 5/5e network cable

Supports video resolutions up to 1080p / 60Hz / 48-bit

100m (330ft) maximum Cat5 cable distance

Supports bi-directional RS232 and IR communication

High Speed HDMI and HDCP compliant

Audio transmission supports Dolby TrueHD, DTS-HD MA

RS232 interface supports up to 115200bps full-duplex data rate

No software or drivers required

Dimensions & Weight

5.9"L x 3.1"W x 1"H

Package Contents

Package Content
1 - Local HDMI Extender Unit
1 - Remote HDMI Receiver Unit
1 - IR Receiver Cable
1 - IR Transmitter Cable
1 - HDMI Cable - 4 ft (1.2 Meters)
2 - Universal Power Adapter NA / UK / EU
1 - User Manual
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Customer Reviews of the STARTECH ST121UTPHD2

There are no reviews yet... do you own this product? Write a Review

ICON Loading...

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
Wall Plate Extender 300 m / 950 ft ...
StarTech VGA Wall Plate Video Extender over Cat5
Wall Plate Extender 300 m / 950 ft (Max) Cabling: Cat 5 UTP
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.