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StarTech.com ST121HDBTL HDBaseT HDMI Extender Kit - 4K 30Hz over CAT5e/CAT6 with IR & Serial - 328 ft Range - Rack/Desktop Mount
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Product Features
Technical Overview
This HDBaseT extender supports 4K resolution at 3840 x 2160 with 4:4:4 chroma subsampling and YUV video encoding for accurate color reproduction. The system extends 4K 30Hz signals up to 115 feet (35 meters) over CAT5e/CAT6 cable, while 1080p content can reach 230 feet (70 meters). Two RJ-45 ports facilitate the point-to-point connection without requiring network switches or configuration.
Power over Cable (PoC) technology allows the included universal power adapter to be placed at either the transmitter or receiver end, providing installation flexibility in locations with limited power access. The extender is HDCP 1.4 compliant for protected content playback and includes comprehensive environmental compliance with RoHS, WEEE, and REACH standards.
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
This extender kit simplifies complex AV installations with plug-and-play operation that requires no drivers or network configuration. The included mounting brackets and foot pads support both rack installation in equipment cabinets and desktop placement in conference rooms or control centers.
Professional Control Integration
Simultaneous extension of IR and RS-232 serial signals allows centralized control of source devices and displays from remote locations, eliminating the need for separate control system extenders.
- IR Receiver and Blaster included
- RS-232 serial pass-through
- Mounting hardware for flexible placement
Installation Flexibility
The universal power adapter works with North American, European, UK, and Australia/New Zealand outlets, while Power over Cable technology enables single-point powering for challenging installation environments.
- Universal 100-240V power adapter
- Power placement at either end
- 5 ft CAT5e test cable included
Deployment / Use Cases
Digital signage installations benefit from the extended 4K video transmission between media players and large-format displays in retail environments, corporate lobbies, and transportation hubs. The rack-mountable form factor integrates neatly into equipment racks alongside other AV components.
In conference rooms and lecture halls, the extender enables placement of source equipment in secure closets while delivering high-quality video to wall-mounted displays. The included IR control extension allows users to operate Blu-ray players, streaming devices, or document cameras from the presentation area without running additional control cables.
Commercial AV Systems
Ideal for integrators designing systems for hotels, worship facilities, and corporate campuses where reliable long-distance HDMI transmission is essential for video distribution.
Control Room Applications
Enables centralized equipment management in security operations centers, broadcast facilities, and command centers where multiple displays require extended video feeds from distant source devices.
What's in the Box
This complete kit includes everything needed for immediate deployment in professional AV environments.
Highlights
- Extends 4K 30Hz HDMI video and 7.1CH audio up to 115 ft over CAT5e/CAT6 cable
- HDBaseT Alliance certified for guaranteed compatibility and performance
- Includes simultaneous IR and RS-232 serial control extension
- Power over Cable technology allows flexible power adapter placement
- No drivers or network configuration required for plug-and-play operation
- Rack-mountable and desktop form factor with included mounting hardware
- Universal power adapter supports NA, EU, UK, and ANZ outlets
- HDCP 1.4 compliant for protected content playback
- 4:4:4 chroma subsampling maintains accurate color reproduction
- TAA compliant and environmentally friendly with RoHS/WEEE/REACH compliance
Specifications
| Specifications | |
|---|---|
| Manufacturer | StarTech.com |
| Manufacturer Part Number | ST121HDBTL |
| Brand Name | StarTech.com |
| Product Name | HDMI over CAT5 Extender with IR and Serial - HDBaseT Extender - 4K |
| 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 | 328.08 ft (100000 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 |
| Transmitter Height | 1.10" (27.94 mm) |
| Transmitter Width | 2.60" (66.04 mm) |
| Transmitter Depth | 3.60" (91.44 mm) |
| Receiver Height | 1.10" (27.94 mm) |
| Receiver Width | 2.60" (66.04 mm) |
| Receiver Depth | 3.60" (91.44 mm) |
| Form Factor | Rack-mountable,Desktop |
| Transmitter Weight (Approximate) | 15.94 oz (452 g) |
| Receiver Weight (Approximate) | 15.94 oz (452 g) |
| Miscellaneous | |
| Package Contents | HDBaseT Transmitter HDBaseT Receiver Universal Power Adapter (NA, EU, UK, ANZ) IR Receiver IR Blaster 5ft (1.5m) Cat5e Cable Mounting Brackets Foot Pads |
| Country of Origin | Taiwan |
| TAA Compliant | Yes |
| Environmentally Friendly | Yes |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS),Waste Electrical and Electronic Equipment Directive (WEEE),Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) |
| Warranty | |
| Limited Warranty | 2 Year |
User Manual
FAQ
What maximum resolution does this HDMI extender support?
The StarTech.com ST121HDBTL supports 4K Ultra HD resolution at 3840 x 2160 pixels with 4:4:4 chroma subsampling for accurate color reproduction. It maintains this resolution at 30Hz refresh rate when extending signals up to 115 feet over CAT5e or CAT6 cable, making it suitable for professional digital signage and presentation applications requiring high-definition video quality.
How far can this extender transmit 4K and 1080p signals?
This HDBaseT extender transmits 4K 30Hz signals up to 115 feet (35 meters) and 1080p signals up to 230 feet (70 meters) over standard CAT5e or CAT6 Ethernet cable. The maximum operating distance specification of 328 feet represents the technical limit, with actual usable distances depending on cable quality and environmental factors for different resolution requirements.
Does this extender require network equipment or configuration?
No network equipment or configuration is required. The extender establishes a direct point-to-point connection between the transmitter and receiver using the included CAT5e cable or your own Ethernet cable. There are no IP addresses to configure, no drivers to install, and no network switches needed—simply connect the HDMI sources and displays for immediate plug-and-play operation.
What control signals can be extended alongside the HDMI video?
The extender simultaneously transmits IR (infrared) and RS-232 serial control signals over the same CAT5e/CAT6 cable used for video. The included IR Receiver captures remote control commands at the display location, while the IR Blaster relays those commands to the source device. RS-232 serial extension enables integration with professional control systems for automated device management.
Can this extender be used in rack-mounted installations?
Yes, both the transmitter and receiver are designed for rack mounting with included brackets. The compact 1U-height form factor fits standard equipment racks, while the desktop form factor with adhesive foot pads provides placement flexibility. The black finish blends with professional AV equipment, and the identical dimensions of both units ensure consistent mounting in rack environments.
What power options are available for installation flexibility?
The kit includes a universal power adapter compatible with North American, European, UK, and Australia/New Zealand outlets (100-240V). Power over Cable technology allows the adapter to be placed at either the transmitter or receiver end, providing installation flexibility in locations with limited power access. This single-adapter approach simplifies wiring while ensuring reliable operation.
| Qty | Price | Available |
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