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Pro A/V Extender & Repeater > 
Item#: N82E16815158376

StarTech HDMI over Single Cat 5e/6 Extender with Power over Cable Ethernet and IR - 330 ft ST121HDT4P

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Including a transmitter and a remote receiver, the StarTech ST121HDT4P HDMI extender is designed to send an HDMI video/audio to up to 330 feet (100 meters) away at resolutions up to 1080p over a single Cat5e/6 cable. This allows you to make use of less expensive and non-proprietary Ether cabling, great for extending your display across harsh environments or industrial sites. In addition to HDMI signals, this kit also supports the extension of the infrared signals of remote controls, and two Ethernet LAN connections, over the same Cat5e/6 cable. For added convenience, this kit features Power over Cable technology, and only requires a single power adapter to power both the transmitter and receiver.

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

  • newegg Superior A/V Quality Supports high resolutions of up to 1920x1080/1080p, and the accompanying digital audio, for the best A/V experience.
  • newegg Power over Cable This kit features Power over cable, requiring only a single power adapter to connect the transmitter to power both units.
  • newegg More Flair Over the same Cat5e/6 cable, this kit can also extend two Ethernet LAN connections, and infrared for IR remote controls, so you can control the source device at the display end.

Learn more about the STARTECH ST121HDT4P




100 m / 330 ft.(Max)
Resolution Support
1080p / 1920x1080


Power Supply
Input Current: 2A
Input Voltage: 100~240V
Output Current: 0.5A
Output Voltage: 48 DC


Audio: Yes
Cabling: Cat 5e UTP or better
Output Signal: HDMI
Daisy-Chain: No

Connector Type(s):
1 - HDMI (19 pin) Female
3 - RJ-45 Female
2 - IrDA (Infrared; SIR/FIR) Female

Connector A:
1 - HDMI (19 pin) Male
2 - IrDA (Infrared; SIR/FIR) Female
3 - RJ-45 Female

Maximum Cable Length: 0.3 ft.
Wide Screen Supported: Yes


Power Over Cable, allows a single power source to operate the transmitter and Receiver

Supports Cat5e or Cat6 Ethernet cabling

Supports HD resolutions up to 1080p (1920x1080)

No software/drivers required

330ft (100m) Maximum HDMI extension

Includes transmitter (local) and receiver (remote) units

2 x Ethernet LAN Extension

IR Remote Control Extension

Package Contents

Package Content
1 x HDMI Extender Transmitter Unit
1 x HDMI Extender Receiver Unit
1 x Instruction Manual
1 x Universal Power Adapter (NA/UK/EU)
2 x IR Extender Cables
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 ST121HDT4P

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  • Irene V.
  • 1/6/2016 7:52:25 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsLove this device

Pros: great that i can run 1 cat6 cable to the TV from the network closet. Makes longer runs a breeze.
has IR receiver so the remote works

Cons: product was DOA - no problem, it happens sometimes

Other Thoughts: Product was DOA but RMA with startech was a breeze. I missed the 30day RMA window with the newegg seller, so had to go right to StarTech. They cross-shipped the new one for me... so no real loss in time. Startech products have always been loyal to me - I would buy again.

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Home > 
Electronics > 
Professional Video Devices > 
Pro A/V Extender & Repeater > 
Item#: N82E16815158376
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