
HDMI Over CAT6 Extender - Power Over Cable - Up
to 70 m (230 ft.)
Product ID: ST121HDBT20S
This HDMI® over CAT6 extender transmits your HDMI audio/video signal to a remote location up to 70 m
(230 ft.) away.
Get 4K at 60Hz from 30 m (115 ft.) away
This HDMI over CAT6 extender maintains your Ultra HD 4K picture quality, even at 30 m (115 ft.) away
from your video source. If you're not running 4K video, this extender supports High-Definition 1080p
60Hz and lower resolutions at even greater distances, up to 70 m (230 ft.) from your HDMI source.
With full support for your HDMI 2.0 equipment, including 4K resolution at 60Hz, this extender can
transmit at a bandwidth of up to 18Gbps, making it the ideal solution for high-resolution tasks requiring
the highest color detail. For smoother video and color transitions, the extender offers 4:4:4 chroma
subsampling via visually lossless compression, meaning every pixel gets its own unique color.
www.startech.com
1 800 265 1844

Simplify your setup
The HDMI Extender Over CAT6 offers a hassle-free solution for your digital signage project. The extender
only requires a single CAT5e or CAT6 cable, so you can extend an HDMI signal using your building's
existing infrastructure. Plus, this HDMI extender supports Power Over Cable (POC), which means you’ll
only need one power adapter connected to either your transmitter or receiver. Mounting hardware is also
included for discreet, professional installation.
The ST121HDBT20S is TAA compliant and backed by a 2-year StarTech.com warranty with free lifetime
technical support.
www.startech.com
1 800 265 1844

Certifications, Reports
and Compatibility
Applications
• Distribute HDMI in large buildings such as commercial shopping
centers, stadiums, schools, and hospitals
• Extend your HDMI audio/video signals to locations where power
outlets are limited, such as industrial sites
• Integrators and system designers can use existing CAT5 or CAT6
infrastructure to create digital-signage solutions
Features
• Get astonishing video quality at impressive distances with UHD 4K
60Hz resolution at up to 30 m (115 ft.) and 1080p 60Hz resolutions
at up to 70 m (230 ft.)
• Hassle-free setup with video and power over a single CAT5e or CAT6
cable
• Sleek professional installation with optional mounting hardware
included
• Remotely control your video source from the location of your remote
display, with support for IR extension
www.startech.com
1 800 265 1844

Warranty 2 Years
Hardware Audio Yes
Cabling Cat 5e UTP or better
Daisy-Chain No
Ports 1
Performance Audio Specifications 7.1 Surround Sound
Max Distance 70 m / 230 ft
Maximum Cable Length 230 ft [70.1 m]
Maximum Digital Resolutions Up to 30 m: 4096 x 2160 (4K) @ 60 Hz
Up to 70 m: 1080p @ 60Hz
Supported Resolutions 3840x2160 (4K) @ 60 Hz
2560x1600
1920x1200 @ 60 Hz
1920x1080 (1080p)
1280x720 (720p)
Wide Screen Supported Yes
Connector(s) Local Unit Connectors 1 - HDMI (19 pin) Female Input
1 - RJ-45 Female Output
Remote Unit Connectors 1 - RJ-45 Female Input
1 - HDMI (19 pin) Female Output
Indicators LED Indicators 1 - status LED (local)
1 - status LED (remote)
Power Center Tip Polarity Positive
Input Current 0.6A
Input Voltage 100 ~ 240 AC
Output Current 1 A
Output Voltage 18 DC
Plug Type M
Power Consumption (In Watts) 18
Power Source AC Adapter Included
Environmental Humidity 0% - 80 % RH (non-condensing)
Operating Temperature 0°C to 40°C (32°F to 104°F)
Storage Temperature -10°C to 60°C (14°F to 140°F)
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1 800 265 1844

Physical
Characteristics
Color Black
Enclosure Type Aluminum
Product Height 1 in [26 mm]
Product Length 4 in [102 mm]
Product Weight 3.9 oz [110 g]
Product Width 3 in [76 mm]
Packaging
Information
Shipping (Package) Weight 0.5 lb [0.2 kg]
What's in the Box Included in Package 1 - HDMI over CAT6 transmitter
1 - HDMI over CAT6 receiver
1 - IR blaster
1 - IR receiver
1 - universal power adapter (NA/JP, EU, UK, ANZ)
2 - mounting brackets
8 - rubber feet
1 - quick-start guide
AV Input HDMI
AV Output HDMI
Product appearance and specifications are subject to change without notice.
www.startech.com
1 800 265 1844