StarTech.com ST121HD20V HDMI over CAT6 Extender Kit - 4K 60Hz HDR 4: 4: 4 - 164 ft Range - Black
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Product Features
Technical Overview
This extender kit operates over a single Category 6 cable, utilizing both pairs for bidirectional data transmission to maintain 4K quality without compression artifacts. The transmitter unit accepts HDMI input from a source device and converts it to a signal suitable for Cat6 cabling, while the receiver reconstructs the HDMI output for display. The system supports full 18 Gbps bandwidth, enabling 4:4:4 chroma subsampling for precise color reproduction in text and graphics.
Two RJ-45 ports on each unit facilitate daisy-chaining or direct connection, and the universal power adapter supports multiple regional plugs (NA/JP, EU, UK, ANZ) for global deployment. The compact black enclosures blend discreetly into AV racks or behind displays, with no external cooling required for continuous operation.
Relevant factors for this section include Connectivity Technology, Number of Input Devices Supported, Number of Output Devices Supported, Graphics Modes. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
Beyond raw resolution, the kit's HDR support enhances contrast and color depth for cinematic content, while the integrated IR system allows users to control source devices remotely from the display location. The plug-and-play design requires no software configuration, and the included quick-start guide streamlines deployment for integrators and end-users alike.
Long-Distance 4K Clarity
Extend uncompressed 4K 60Hz video up to 164 feet over affordable Cat6 cable, eliminating the need for expensive HDMI fiber optics or signal boosters in medium-range installations.
Professional Color Integrity
4:4:4 chroma subsampling preserves exact pixel color data, critical for presentations, medical imaging, and design work where color accuracy and sharp text rendering are non-negotiable.
Deployment / Use Cases
Home theater enthusiasts can hide gaming consoles or Blu-ray players in cabinets and run discreet Cat6 lines to TVs, maintaining full 4K HDR gaming and movie playback. The kit is also suitable for control room environments where source equipment must be located away from operator desks due to heat or noise constraints.
Installers appreciate the universal power adapter's regional plug options, reducing the need for separate power supplies when deploying kits internationally. The 2-year warranty and RoHS/REACH/WEEE compliance provide additional assurance for commercial and institutional purchases.
Corporate & Education AV
Extend laptop or media player signals to ceiling-mounted projectors or wall displays in boardrooms, classrooms, and training facilities without sacrificing 4K detail for presentations and video conferences.
Digital Signage & Retail
Place media players in secure closets while driving 4K content to multiple displays across a store floor or lobby, using cost-effective Cat6 infrastructure already in place for networking.
What's in the Box
This kit includes all components necessary for immediate deployment:
Highlights
- Extends 4K 60Hz video up to 164 feet over Cat6 cable
- Supports HDR and 4:4:4 chroma subsampling for accurate colors
- HDCP 2.2 compatible for protected content playback
- Includes IR blaster and receiver for remote control passthrough
- Universal power adapter with multiple regional plugs
- Plug-and-play setup with no software required
- Compact black enclosures for discreet installation
- 2-year limited warranty and RoHS/REACH/WEEE compliance
Specifications
| Specifications | |
|---|---|
| Manufacturer | StarTech.com |
| Manufacturer Part Number | ST121HD20V |
| Brand Name | StarTech.com |
| Product Name | HDMI over CAT6 Extender Kit - 4K 60Hz |
| Packaged Quantity | 1 Kit |
| Product Type | Video Extender Transmitter/Receiver |
| Technical Information | |
| Connectivity Technology | Wired |
| Number of Input Devices Supported | 1 |
| Number of Output Devices Supported | 1 |
| Maximum Operating Distance | 164.04 ft (50000 mm) |
| Video | |
| Graphics Modes | 4K |
| Maximum Video Resolution | 3840 x 2160 |
| Interfaces/Ports | |
| Network (RJ-45) | Yes |
| HDMI In | Yes |
| HDMI Out | Yes |
| Number of Network (RJ-45) Ports | 2 |
| Number of HDMI Inputs | 1 |
| Number of HDMI Outputs | 1 |
| Media & Performance | |
| Media Type Supported | Twisted Pair |
| Twisted Pair Cable Standard | Category 6 |
| Physical Characteristics | |
| Color Family | Black |
| Product Color | Black |
| Miscellaneous | |
| Package Contents | 1 x HDMI over CAT6 Transmitter 1 x HDMI over CAT6 Receiver 1 x IR Blaster 1 x IR Receiver 1 x Universal Power Adapter (NA/JP, EU, UK, ANZ) 1 x Quick-Start Guide |
| Country of Origin | China |
| Environmentally Friendly | Yes |
| Environmental Certification | EU RoHS |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) 2,Registration, Evaluation, Authorization and Restriction of Chemicals (REACH),Waste Electrical and Electronic Equipment Directive (WEEE) |
| Warranty | |
| Limited Warranty | 2 Year |
User Manual
FAQ
What is the maximum resolution and refresh rate supported by this extender kit?
The StarTech.com ST121HD20V supports resolutions up to 4K UHD (3840 x 2160) at a 60Hz refresh rate. This ensures smooth video playback for gaming, movies, and presentations without frame drops or motion blur, making it suitable for high-performance AV applications.
How far can I extend the HDMI signal using this kit?
This extender kit transmits HDMI signals up to 164.04 feet (50 meters) over a single Category 6 twisted-pair cable. The distance is achieved without signal degradation, maintaining full 4K quality and HDR support across the entire range for reliable long-distance installations.
Does this extender support HDR and 4:4:4 chroma subsampling?
Yes, the kit fully supports HDR (High Dynamic Range) for enhanced contrast and color depth, along with 4:4:4 chroma subsampling. This preserves exact color information per pixel, which is critical for text clarity, graphic design work, and accurate video reproduction in professional settings.
What cables and equipment do I need to use this extender kit?
You need a standard Category 6 Ethernet cable (not included) to connect the transmitter and receiver, plus HDMI cables (not included) for your source and display. The kit includes the transmitter, receiver, IR components, universal power adapter, and quick-start guide—everything else uses your existing AV cables.
Is this extender compatible with HDCP 2.2 protected content?
Yes, the extender is fully compatible with HDCP 2.2, the latest content protection standard. This ensures seamless playback of encrypted 4K content from streaming services, Blu-ray players, gaming consoles, and other protected sources without handshake issues or black screens.
What is included in the package besides the transmitter and receiver?
The kit includes an IR blaster and IR receiver for remote control passthrough, a universal power adapter with interchangeable plugs for North America/Japan, Europe, UK, and Australia/New Zealand regions, and a quick-start guide. All components are designed for immediate setup without additional purchases.
| Qty | Price | Available |
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