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StarTech Ultra HD 4K HDMI over Cat 5e/6 HDBaseT Extender Kit (230')

BH #ST121HDBTE • MFR #ST121HDBTE
13 reviews
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StarTech Ultra HD 4K HDMI over Cat 5e/6 HDBaseT Extender Kit (230')
Key Features
  • 4K, 2K, 1080p, 3D HDMI Signal Extender
  • Transmit UHD 4K Video up to 115'
  • Transmit 1080p Video up to 230'
  • Power Both Units with 1 PSU using PoH
Transmit HDMI video up to 230' with this Ultra HD 4K HDMI over Cat 5e/6 HDBaseT Extender Kit from StarTech. The kit includes a transmitter and a receiver that feature HDMI input and output that is extended beyond the limited distance of HDMI. The system can transmit video to up to 230' when transmitting 1080p60 video and up to 115' when transmitting 4K30 video over Cat 5e or Cat 6 cable. Applications include trade show demos, video walls, displays in large conference rooms, and areas where connectivity and power supplies are limited.
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$199.95
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Transmission Distance
230'
330'
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StarTech ST121 Overview

Transmit HDMI video up to 230' with this Ultra HD 4K HDMI over Cat 5e/6 HDBaseT Extender Kit from StarTech. The kit includes a transmitter and a receiver that feature HDMI input and output that is extended beyond the limited distance of HDMI. The system can transmit video to up to 230' when transmitting 1080p60 video and up to 115' when transmitting 4K30 video over Cat 5e or Cat 6 cable. Applications include trade show demos, video walls, displays in large conference rooms, and areas where connectivity and power supplies are limited.

The units utilize HDBaseT connectivity that can transmit video and serial communication over a single cable. Embedded audio transmission up to 7.1 surround sound is supported. It also features Power-over-HDBaseT (PoH) capability, which lets you power both units with only one power supply connected to either unit to also limit cabling.

Key Features
HDMI input and RJ45 output on transmitter, RJ45 input and HDMI output on receiver
Transmit UHD 4K30 video up to 115'
Transmit 1080p60 video up to 230'
Utilizes Power-over-HDBaseT; one power supply included
Uses single Cat 5e/6 cable for transmission, sold separately
Supports up to 7.1-channel surround sound
UPC: 065030851107

StarTech ST121 Specs

Interfaces
Transmission I/O
Transmitter:
1x HDMI Input
1x RJ45 Output
Receiver:
1x HDMI Output
1x RJ45 Input
Embedded Audio
HDMI
Power I/O
Transmitter:
1x Barrel (12 VDC at 1.5 A) Output
Standards
HDCP Support
Yes
Transmission
Max Transmission Distance
UHD 4K at 30 Hz:
114.8' / 35 m (via Cat 5e/6)
1080p, 720p at 60 Hz:
230' / 70.1 m (via Cat 5e/6)
Video Format
HDMI :
3840 x 2160: 30 fps
1920 x 1080p: 50/60 fps
2048 x 1080
1280 x 720p
Supported Cable Types
Cat 5e/6
Power
PoE Support
Yes: PoH 802.3at
Power Consumption
Transmitter:
7 W
Receiver:
7 W
General
Operating Conditions
32 to 72°F / 0 to 40°C up to 80% Humidity
Storage Conditions
14 to 140°F / -10 to 60°C
Dimensions
Transmitter:
3.1 x 2.6 x 1" / 80 x 67 x 25 mm
Weight
Transmitter:
15.1 oz / 428 g
Receiver:
15.1 oz / 428 g
Packaging Info
Package Weight
2.4 lb
Box Dimensions (LxWxH)
9 x 6 x 2.39"

StarTech ST121 Reviews

Solid Equipment

By David
Rated 5 out of 5
Date: 2026-01-21

This is a very solid HDMI over CAT cable extender. StarTech is a strong company that has been around for a long time. This extender works very easily right out of the box. The price point compared to the quality of the product is outstanding. I would recommend this for any needs in extending HDMI up to 100 meters.

Easy and Effective

By Christopher
Rated 5 out of 5
Date: 2021-03-11

The StarTech device worked great from the time we plugged it in. Since it only needs power at one end (and either end works), it was easy to install and is flexible. Liked it so much that we are replacing another extender of a different brand.

See any errors on this page?

If power over cable is not available, do the ...

If power over cable is not available, do the appropriate power supplies come with the package to power both boxes?
Asked by: Thomas
The StarTech Ultra HD 4K HDMI over Cat 5e/6 HDBaseT Extender Kit (230') only comes with one power supply; however, the kit can be powered from either side with an Ethernet cable delivering power to the corresponding side.
Answered by: Elliot
Date published: 2024-05-22

Will this work with Cat6e?

Will this work with Cat6e?
Asked by: Jordan
Manufacturer states that 5e and 6 are supported. 6e is not included on their specs.
Answered by: Bruno
Date published: 2021-04-23
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