# StarTech.com 4K HDMI over Fiber Extender Kit ST121HD20FXA2 — 4K60, LC fiber (SM 1 km / MM 300 m), HDR, HDCP, 3.5mm Audio, RS232, IR

**URL:** https://aio.lv/en/product--no-name-st121hd20fxa2--11754740
**Data updated:** 2026-03-08 15:50 (EET)
**Category:** Audio & Video Extenders
**Manufacturer:** No name
**Manufacturer code:** ST121HD20FXA2
**EAN:** 0065030897303
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 796.49 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 658.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--no-name-st121hd20fxa2--11754740

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

AV transmitter and receiver kit for transmitting 4K UHD (4096 x 2160) at 60 Hz over LC fiber optic cable. Supports single-mode up to 1 km (3300 ft) and multimode up to 300 m (1000 ft), HDR and HDCP compliance. Includes 3.5 mm audio pass-through, RS232 and IR control lines. Wired connectivity with Micro-USB B power input (5 V, 0.35 A) and AC adapter compatibility (100–240 V). Compact metal units for long-distance AV distribution in digital signage, lecture halls, conference rooms and AV installations.

## Long description

The StarTech.com 4K HDMI over Fiber Extender Kit ST121HD20FXA2 is an AV transmitter and receiver kit that extends HDMI audio and video signals up to 4K UHD (4096 x 2160) at 60 Hz over LC fiber optic cable. The kit supports both single-mode fiber (up to 1 km) and multimode fiber (up to 300 m), and provides HDR10 and HDCP 2.2 compliance. Each compact metal unit includes a local HDMI output, 3.5 mm audio pass-through, RS232 and IR control lines, LED status indicators and built-in mounting brackets for rack or surface installation.
Advantages
This fiber HDMI extender transmits full-bandwidth 4K 60Hz video with 7.1 channel audio while remaining immune to electromagnetic interference, enabling reliable long-distance AV distribution. The point-to-point single-strand LC connection eliminates the need for network configuration or drivers, simplifying installation and reducing potential points of failure. The units offer audio extraction via the receiver, EDID copy for correct display negotiation, and ESD protection to help ensure stable operation in professional AV environments.
Suitable for
Digital signage and video walls in retail, transportation hubs and public spaces
Lecture halls, auditoriums and classrooms requiring long-distance HDMI distribution
Conference rooms and boardrooms with centralized AV sources and remote displays
Professional AV installations where EMI immunity and long cable runs are required
Control systems that use RS232 or IR for device management and automation
Key specifications
Maximum video resolution: 4096 x 2160 at 60 Hz (4K60)
Audio support: up to 7.1 channel audio with 3.5 mm analog audio output on receiver
Fiber connectors: Single-strand LC/UPC
Supported fiber types and distances: single-mode up to 1 km; multimode up to 300 m
HDR support: HDR10
HDCP support: HDCP 2.2
Chroma subsampling: up to 4:4:4
Control interfaces: RS232 and IR pass-through
Power input: Micro-USB B (5 V, 0.35 A) or compatible AC adapter (100–240 V)
Construction: compact metal housing with mounting brackets; LED status indicators
Protection: electrostatic discharge protection (8 kV air / 6 kV contact)
How to use
Connect the transmitter unit to the HDMI source device and the receiver unit to the display via the local HDMI outputs. Use a single-strand LC fiber cable between the transmitter and receiver, choosing single-mode or multimode fiber according to the required distance. Power each unit via the Micro-USB B power input or the supplied AC adapter. If needed, connect RS232 or IR control lines to enable remote control of connected devices. Use the EDID copy function during initial setup to ensure the source and display negotiate the correct resolution and audio format. Monitor LED indicators to verify link status and operation.
Usage recommendations
Install fiber cabling following local standards and best practices for bend radius and connector cleanliness. For distances approaching the maximum single-mode range, verify fiber type and condition, and test the link end-to-end before final mounting. When using audio extraction, confirm the display and receiver audio settings to avoid duplicate or muted audio outputs. For installations involving projectors or automation systems, test RS232 and IR commands during configuration to confirm reliable control communication.

## Specifications

### Technical details

| Feature | Value |
|---|---|
| Sustainability compliance | Yes |
| Compliance certificates | CE, RoHS |

### Ports & interfaces

| Feature | Value |
|---|---|
| HDMI in | 1 |
| Number of HDMI outputs | 2 |
| Serial interface type | RS-232 |
| Serial ports quantity | 2 |
| USB connector type | Micro-USB B |
| DC-in jack | Yes |
| HDMI version | 2.1 |
| Remote (IR) input | 2 |
| Remote (IR) output | 2 |
| Line outputs (RCA) | 1 |
| USB ports quantity | 2 |
| Line-in | Yes |
| Connectivity technology | Wired |
| Fiber ports quantity | 2 |
| Fiber optic connector | LC |

### Power

| Feature | Value |
|---|---|
| Input current | 0.35 |
| Output current | 1 A |
| Operating voltage | 5 V |
| AC input voltage | 100 - 240 |
| Power plug type | Type M |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.28 kg |
| Height | 18 mm |
| Width | 68 mm |
| Depth | 134 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 20 - 90 |
| Storage temperature (T-T) | -20 - 60 |
| Operating temperature (T-T) | 0 - 40 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 1000 g |
| Package depth | 300 mm |
| Package height | 60 mm |
| Package width | 200 mm |

### Packaging content

| Feature | Value |
|---|---|
| AC adapter included | Yes |
| Quick start guide | Yes |
| IR blaster included | Yes |
| IR receiver included | Yes |

### Features

| Feature | Value |
|---|---|
| Type | AV transmitter & receiver |
| Maximum resolution | 4096 x 2160 |
| Maximum transfer distance | 1000 m |
| Product colour | Black |
| Audio output channels | 7.1 |
| Bandwidth | 18 Gbit/s |
| HDCP | Yes |
| Maximum refresh rate | 60 Hz |
| Electrostatic Discharge (ESD) protection | 8 kV |
| Baud rate | 115.2 Kbit/s |
| Chipset | SiFotonics SD1503/SD1513 |
| LED indicators | Power, Activity |
| Fiber mode structure | Single-mode, Multi-mode |
| HDCP version | 2.2 |
| Infrared (IR) frequency range | 20 - 60 |
| Extended display identification data (EDID) | Yes |
| High Dynamic Range (HDR) supported | Yes |
| Electrostatic Discharge (ESD) protection | Yes |
| High Dynamic Range (HDR) technology | High Dynamic Range 10 (HDR10) |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 402 mm |
| Master (outer) case width | 325 mm |
| Master (outer) case length | 530 mm |
| Products per master (outer) case | 20 pc(s) |

## FAQ

### How much does the StarTech.com 4K HDMI over Fiber Extender Kit ST121HD20FXA2 cost, and is it available for purchase?

The price is 796.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can StarTech.com 4K HDMI over Fiber Extender Kit ST121HD20FXA2 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All No name products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized No name service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: hdmi in, number of hdmi outputs, weight, type, maximum resolution, maximum transfer distance, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for StarTech.com 4K HDMI over Fiber Extender Kit ST121HD20FXA2?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/11754740/67151823_large.webp