HDMI Over CAT6 Extender - Power Over Cab

  • RS Stock No. 186-1961
  • Mfr. Part No. ST121HDBT20S
  • Manufacturer Startech
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): TW
Product Details

ST121HDBT20S HDMI over CAT6 Extender

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.

With HDR support, you can enjoy lifelike images with increased contrast, brightness and colors and greater luminosity than standard digital imaging.

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.

Features & Benefits

• 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
• Supports HDR for expanded contrast ratio and color accuracy


• 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

What’s in the package?

• HDMI over CAT6 transmitter
• HDMI over CAT6 receiver
• IR blaster
• IR receiver
• universal power adapter (NA/JP, EU, UK, ANZ)
• mounting brackets
• rubber feet
• quick-start guide

Attribute Value
Type Extender
Video Connection Type HDMI
Number of Video Ports 1
Transmission Method CATx
Maximum Resolution 4096 x 2160
Extension Distance 70m
Audio Connection Type HDMI
Local Device Dimensions 29.3 cm x 76 mm x 2.6 cm
Local Device Weight 1.6kg
Remote Device Dimensions 29.3 cm x 76 mm x 2.6 cm
Local Device Depth 76mm
Remote Device Depth 76mm
3 In stock for delivery within 5 working day(s) (Global Stock)
Price (ex. GST) Each
$ 892.73
(exc. GST)
$ 982.00
(inc. GST)
Per unit
1 +
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