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8K60 HDMI 2.1 over HDBaseT Extender with USB 2.0, IR & RS-232, 100m

VLEX-H21U2100

  • 8K@60Hz 4:2:0 12-bit HDMI 2.1 extension up to 100m/328ft over a single Cat5e/6 cable

  • VRR, ALLM, QMS, QFT, and SBTM pass-through preserve HDMI 2.1 gaming and low-latency features at distance

  • Bi-directional IR, RS-232, and CEC pass-through for full remote source and display control

  • Bi-directional PoC powers the link from either end, simplifying installation

Where to Buy

Product Description

The VLEX-H21U2100 is a long-reach HDBaseT extender built for next-generation HDMI 2.1 sources, carrying HDMI, USB 2.0, bi-directional IR, and RS-232 up to 100m/328ft over a single Cat5e/6 cable. Video resolution reaches 8K@60Hz at 4:2:0 12-bit, or 4K@144Hz at full 4:4:4, with HDCP 2.3 compliance and 48Gbps FRL / 18Gbps TMDS video bandwidth.

Full HDMI 2.1 protocol support, including VRR, ALLM, QMS, QFT, and SBTM, passes through intact across the extended run, keeping adaptive sync and low-latency gaming features functional at the display end. Bi-directional IR, RS-232, and CEC pass-through provide remote control of source or display equipment from either end, while advanced EDID management and bi-directional PoC round out a compact design for installations where next-generation 8K or high-frame-rate 4K signals need to travel well beyond standard HDMI cable length.

Key Features

  • HDCP 2.3 compliant

  • Video bandwidth up to 48Gbps FRL and 18Gbps TMDS

  • Video resolution up to 8K@60Hz 4:2:0 12-bit, 4K@144Hz 4:4:4, per HDMI 2.1

  • HDMI 2.1 protocols supported: VRR, ALLM, QMS, QFT, SBTM

  • Transmission distance up to 100m/328ft over Cat5e/6 cable

  • USB 2.0 signal transmission

  • Bi-directional IR, RS-232, and CEC pass-through

  • HDMI audio formats: LPCM, Dolby Digital/Plus/EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DTS:X

  • Audio de-embedding on the receiver

  • Advanced EDID management

  • HDR10, HDR10+, Dolby Vision, and HLG pass-through

  • Bi-directional PoC (Power over Cable)

  • Compact metal enclosure for flexible installation

Downloads

DATA SHEET (PDF)
USER MANUAL (PDF)

Ideal Applications

Esports & Competitive Gaming Venues
Extend an HDMI 2.1 console or PC source to displays across a venue floor while preserving VRR, ALLM, and QFT, keeping adaptive sync and low-latency response intact for competitive play at distance from the source rack.

Broadcast & Post-Production Facilities
Bridge 8K camera monitoring or grading displays to a control room or engineering bay beyond standard cable reach, with RS-232 automation and IR pass-through preserving remote control of monitors and playback equipment.

Corporate Boardrooms & Executive Briefing Centers
Deliver 8K or high-frame-rate 4K@144Hz presentation content to a large-format display or video wall mounted at distance, with IR and RS-232 pass-through maintaining display control from the equipment rack.

Home Theater & Luxury AV Integration
Extend next-generation HDMI 2.1 sources, gaming consoles, media servers, and streaming devices to displays in rooms where the equipment rack is located away from the screen, without sacrificing VRR or Dolby Vision.

Simulation, Training, & Visualization Labs
Run high-frame-rate 4K@144Hz or 8K visualization content to displays across simulation or training environments, where QMS and low-latency signal integrity matter for real-time visual feedback.

Command Centers & Critical Monitoring Walls
Extend 8K or high-resolution monitoring sources to video wall displays positioned across a command center, with bi-directional RS-232 and IR pass-through supporting centralized control from the operations desk.

Specifications

Technical
HDMI ComplianceHDMI 2.1
HDCP ComplianceHDCP 2.3
Video Bandwidth48Gbps FRL and 18Gbps TMDS
Video Resolution (Input & Output)Up to 8K@60Hz 4:2:0 12-bit
IR Level5Vp-p
IR FrequencyWideband 20K-60KHz
Color SpaceRGB 4:4:4, YCbCr 4:4:4, YCbCr 4:2:2, YCbCr 4:2:0
Color Depth8/10/12-bit
HDRHDR10, HDR10+, Dolby Vision, HLG
CECSupported
HDMI Audio FormatLPCM, Dolby Digital/Plus/EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DTS:X
Transmission Distance100m/328ft for 8K@60Hz over Cat5e/6 cable; 3m/9.8ft for 8K@60Hz over HDMI cable
ESD ProtectionIEC 61000-4-2: ±8kV (Air-gap discharge), ±4kV (Contact discharge)
Connections
TransmitterInput: 1x IN [HDMI Type A, 19-pin female]; Output: 1x HDBT OUT [RJ45]; Control: 1x HOST [USB-B, 4-pin female], 1x IR IN [3.5mm audio jack], 1x IR OUT [3.5mm audio jack], 1x RS-232 [3-pin 3.5mm phoenix connector], 1x SERVICE [USB-C]
ReceiverInput: 1x HDBT IN [RJ45]; Output: 1x OUT [HDMI Type A, 19-pin female], 1x AUDIO OUT [3.5mm audio jack]; Control: 4x USB 2.0 DEVICE [USB-A, 9-pin female], 1x IR IN [3.5mm audio jack], 1x IR OUT [3.5mm audio jack], 1x RS-232 [3-pin 3.5mm phoenix connector], 1x SERVICE [USB-C]
Mechanical
HousingMetal Enclosure
ColorBlack
DimensionsTx/Rx: 157mm (W) x 88mm (D) x 20mm (H)
WeightTx: 371g; Rx: 378g
Power SupplyDC 24V/1A; bi-directional PoC function
Power Consumption(PoC) 21.2W
Operating Temperature0°C ~ 40°C / 32°F ~ 104°F
Storage Temperature-20°C ~ 60°C / -4°F ~ 140°F
Operating Humidity20%~80% (relative humidity, non-condensing)
Storage Humidity10%~90% (relative humidity, non-condensing)

What’s in the Box

  • 1 x VLEX-H21U2100 HDBaseT Extender (Transmitter)

  • 1 x VLEX-H21U2100 HDBaseT Extender (Receiver)

  • 1 x 24V/1A Locking Power Supply

  • 1 x USB Cable (USB-A to USB-B)

  • 1 x IR Blaster Cable (1.5m)

  • 1 x IR Wideband Receiver Cable (1.5m)

  • 2 x 3-pin 3.5mm Phoenix Connector

  • 4 x Mounting Ear

  • 8 x Machine Screw (KM3x6)

  • 1 x User Manual

Frequently Asked Questions

What is the maximum resolution and distance for the VLEX-H21U2100?
The VLEX-H21U2100 extends 8K@60Hz 4:2:0 12-bit HDMI 2.1 up to 100m/328ft over a single Cat5e/6 cable, or 4K@144Hz at full 4:4:4, with 48Gbps FRL and 18Gbps TMDS video bandwidth.

Does the VLEX-H21U2100 preserve VRR and ALLM for gaming at distance?
Yes. The extender passes VRR, ALLM, QMS, QFT, and SBTM transparently across the full HDBaseT run, so adaptive sync and low-latency game mode continue to function on a compatible display at the receiver end.

What is the difference between the VLEX-H21U2100 and the VLEX-H20U2100?
The VLEX-H21U2100 supports HDMI 2.1 at up to 8K@60Hz with 48Gbps FRL bandwidth and full VRR/ALLM/QMS/QFT/SBTM support, while the VLEX-H20U2100 supports HDMI 2.0b at up to 4K@60Hz 4:4:4 with 18Gbps bandwidth. Choose the H21U2100 for 8K or high-frame-rate 4K@144Hz sources; choose the H20U2100 for standard 4K@60Hz installations.

Can I power this extender from one end only?
Yes. The VLEX-H21U2100 supports bi-directional PoC (Power over Cable), so a single 24V/1A power supply at either the transmitter or receiver can power both units over the Cat cable.

Does this extender support control signals in addition to video?
Yes. The VLEX-H21U2100 passes bi-directional IR and RS-232 control signals, plus CEC, over the same Cat cable as the video signal, allowing remote and serial automation across the full 100m run.

What happens if I connect a display that doesn't support HDMI 2.1?
The VLEX-H21U2100 is backward compatible with HDMI 2.0 and earlier displays through its EDID management. The extender negotiates the highest resolution and feature set the connected display supports, though VRR, ALLM, and 8K/high-frame-rate output require an HDMI 2.1-capable display to take effect.

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