StarTech.com 4K HDMI over Fiber Extender Kit, 4K 60Hz up to 3300ft/1km (Single Mode) or 1000ft/300m (Multimode) LC Fiber Optic, HDR, HDCP, 3.5mm Audio/RS232/IR Extender, Transmitter and Receiver Kit

Manufacturer: Startech | Model: ST121HD20FXA2 | Product ID: 5097 | Warranty: 2 Years
£502.08 (inc. VAT)
19 in stock
100% Money Back Guarantee - Risk Free

Product Technical Specification

Features
TypeAV transmitter & receiver
Maximum resolution4096 x 2160
Maximum transfer distance1000
ChipsetSiFotonics SD1503/SD1513
High Dynamic Range (HDR) supportedYes
High Dynamic Range (HDR) technologyHigh Dynamic Range 10 (HDR10)
Maximum refresh rate60
Fiber mode structureMulti-mode,Single-mode
Extended display identification data (EDID)Yes
Audio output channels7.1
Electrostatic Discharge (ESD) protectionYes
Electrostatic Discharge (ESD) protection8
Infrared (IR) frequency range20 - 60
LED indicatorsActivity,Power
Bandwidth18
HDCPYes
Baud rate115.2
HDCP version2.2
Product colourBlack
Ports & interfaces
Connectivity technologyWired
HDMI in1
Number of HDMI outputs2
HDMI version2.1
Fiber optic connectorLC
Fiber ports quantity2
USB ports quantity2
USB connector typeMicro-USB B
Serial ports quantity2
Serial interface typeRS-232
Remote (IR) input2
Remote (IR) output2
Line outputs (RCA)1
Line-inYes
DC-in jackYes
Power
AC input voltage100 - 240
Operating voltage5
Input current0.35
Output current1
Power plug typeType M
Operational conditions
Operating temperature (T-T)0 - 40
Storage temperature (T-T)-20 - 60
Operating relative humidity (H-H)20 - 90
Weight & dimensions
Width68
Depth134
Height18
Weight280
Packaging data
Package width200
Package depth300
Package height60
Package weight1000
Packaging content
AC adapter includedYes
Quick start guideYes
IR blaster includedYes
IR receiver includedYes
Technical details
Sustainability complianceYes
Sustainability certificatesCE,RoHS
Logistics data
Master (outer) case width325
Master (outer) case length530
Master (outer) case height402
Products per master (outer) case20

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Thu 13th Aug 2026 to Sun 16th Aug 2026
Business Express
£6.95
Business Express

Business Express

Estimated delivery date: Wed 12th Aug 2026 to Fri 14th Aug 2026
View all Delivery Options & International Rates
Extend an HDMI® audio and video signal over optical fiber at resolutions of up to 4K 60Hz with 7.1 channel audioThis HDMI over Fiber Extender Kit extends an Ultra HD (UHD) 4K 60Hz HDMI signal, with 7.1ch audio, up to 3300ft over Single Strand LC fiber cable. This converter kit includes both the transmitter and receiver for a complete end-to-end solution.Works with Single Mode or Multimode FiberThis HDMI extender works over Single Mode or Multimode fiber cabling, allowing the utilization of existing fiber infrastructure. The single strand optical fiber provides full-bandwidth video while being immune to Electro-Magnetic Interference (EMI), making it ideal for use in challenging environments.Fiber TypeSingle ModeMulti ModeSupported DistanceUp to 3300ft (1000m)Up to 1000ft (300m)Audio CapabilitiesAudio extraction functionality enables playback of the HDMI source audio via the 3.5mm audio output on the receiver unit. Simultaneous audio playback across both HDMI and 3.5mm outputs is supported, providing flexibility for a variety of audio setups.Hassle-Free InstallationThe point-to-point connection, using LC single strand fiber between the A/V transmitter and receiver, eliminates the need for IP configuration, drivers, or network equipment. The HDMI extension kit features a durable steel housing with built-in mounting brackets, allowing for a tidy and secure installation.The HDMI over Fiber kit features a local HDMI output and IR/serial extension for a convenient and versatile setup. Ideal for setups that include projectors with RS232 controls, or A/V equipment with IR remote controls. The enhanced EDID Copy functions ensure the correct display information is used during the setup process. LED indicators allow for status monitoring. 8kV air and 6kV contact Electrostatic Discharge (ESD) protection ensures the safety and longevity of the equipment.This product is backed for 2-years, including free lifetime 24/5 multi-lingual technical assistance.The StarTech.com Advantage
Features
TypeAV transmitter & receiver
Maximum resolution4096 x 2160
Maximum transfer distance1000
ChipsetSiFotonics SD1503/SD1513
High Dynamic Range (HDR) supportedYes
High Dynamic Range (HDR) technologyHigh Dynamic Range 10 (HDR10)
Maximum refresh rate60
Fiber mode structureMulti-mode,Single-mode
Extended display identification data (EDID)Yes
Audio output channels7.1
Electrostatic Discharge (ESD) protectionYes
Electrostatic Discharge (ESD) protection8
Infrared (IR) frequency range20 - 60
LED indicatorsActivity,Power
Bandwidth18
HDCPYes
Baud rate115.2
HDCP version2.2
Product colourBlack
Ports & interfaces
Connectivity technologyWired
HDMI in1
Number of HDMI outputs2
HDMI version2.1
Fiber optic connectorLC
Fiber ports quantity2
USB ports quantity2
USB connector typeMicro-USB B
Serial ports quantity2
Serial interface typeRS-232
Remote (IR) input2
Remote (IR) output2
Line outputs (RCA)1
Line-inYes
DC-in jackYes
Power
AC input voltage100 - 240
Operating voltage5
Input current0.35
Output current1
Power plug typeType M
Operational conditions
Operating temperature (T-T)0 - 40
Storage temperature (T-T)-20 - 60
Operating relative humidity (H-H)20 - 90
Weight & dimensions
Width68
Depth134
Height18
Weight280
Packaging data
Package width200
Package depth300
Package height60
Package weight1000
Packaging content
AC adapter includedYes
Quick start guideYes
IR blaster includedYes
IR receiver includedYes
Technical details
Sustainability complianceYes
Sustainability certificatesCE,RoHS
Logistics data
Master (outer) case width325
Master (outer) case length530
Master (outer) case height402
Products per master (outer) case20

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Buykingston order despatch times:

We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

We charge a one off delivery cost as outlined below regardless of how many items you order or the weight of your order.

Estimated delivery times are provided to us by the respective delivery companies. We pass this information onto you, the customer.

Despatch times do not apply to UK public holidays.

Estimated delivery times are taken from the next available working day available for delivery. For example if an order was despatched on a working Wednesday by 3pm, the first available working day for delivery would be Thursday provided you placed your order by 3pm on the Wednesday. If the next available weekday is a UK bank holiday/public holiday then your order will be despatched on the next available working day.

Our warehouse reserves the right to upgrade the delivery method you select on your order.

Our available delivery options*

Contact us for a shipping quote.

*All delivery times are estimated unless stated.

Product Returns Note

Buykingston offers a simple, hassle-free returns policy. If for whatever reason you are not happy with the item purchased, you can return it to us within 14 days of receipt for a refund. This applies to items purchased direct through Buykingston only.

Our 14 Day Returns Money Back Guarantee:
For items returned in resaleable condition, with all original packaging. If an item has been opened for inspection but shows signs of use beyond that, a deduction may apply to reflect the reduced value — see our full Terms & Conditions (Section 12) for details.

Some items are excluded from our money-back guarantee unless they have developed a fault. These include:

- Headphones
- Earphones
- Custom made and designed products, such as flash memory products with custom logos on them, e.g. USB flash drives and memory cards with your own logo

Returns FAQs

What is your returns criteria?
14 days from date of receipt, or expected date of receipt on non-tracked items.

How do I go about returning my order?
Please contact us via our contact page with your order number. We will provide you with an RMA number and return instructions, including your return deadline and whether a freepost label applies to your order.

Do I need to contact you before returning my order?
Yes, to obtain an RMA number before sending anything back.

Does my item have to include its original packaging?
Yes, to qualify for our 14 day money-back guarantee. For faulty items, we understand you may no longer have the original packaging.

Who pays for return postage?
If your item is faulty, damaged, or not as described, we cover reasonable return postage, or provide a freepost label where available. If you are returning an item for another reason (including simply changing your mind), you are responsible for return postage unless we have expressly confirmed a freepost label in your RMA email — we recommend using a tracked and insured service for items of significant value.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer directly for assistance.

Please ensure you have read and comply in full with Sections 11–13 of our Terms & Conditions.