# AV transmitter & receiver StarTech.com ST121HD20L

**URL:** https://aio.lv/en/product--startech-st121hd20l--3093067
**Data updated:** 2025-12-29 10:45 (EET)
**Category:** Audio & Video Extenders
**Manufacturer:** StarTech
**Manufacturer code:** ST121HD20L
**EAN:** 0065030882637
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 465.99 €
**Prices and availability valid until:** 2026-07-04 23:59
**Price without VAT (21%):** 385.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-st121hd20l--3093067

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

The StarTech.com HDMI over CAT6 Extender supports 4K resolution at 60Hz over distances up to 330 ft (100 m). It features a wired connectivity technology, with a maximum resolution of 3840 x 2160 pixels. The device operates on an AC input voltage of 110 - 240 V and has an output current of 2 A. Compact dimensions of 111 mm x 76 mm x 26 mm make it easy to integrate into any setup.

## Long description

The StarTech.com AV transmitter & receiver ST121HD20L is an HDMI over CAT6 extender kit that transmits HDMI signals up to 330 ft (100 m) over a single CAT6 cable. It supports Ultra HD 4K at 60Hz (3840 x 2160) as well as 3D and accompanying digital audio. The kit is compact and designed for use with existing CAT6 infrastructure and standard AC power (110–240 V).
Advantages
This extender provides visually lossless compression for long-distance HDMI transmission while maintaining compatibility with HDCP 2.2 devices and earlier HDMI/HDCP versions. It supports IR pass-through for remote control of the source from the display location. The product supports 4K@60Hz at up to 330 ft (100 m) and 1080p resolutions at distances up to 460 ft (140 m), and includes mounting brackets for straightforward professional installation.
Suitable for
 Extending 4K video and audio between source and display over structured CAT6 cabling
 Digital signage and displays in offices, retail spaces, airports and public venues
 Home or commercial AV installations requiring IR remote control at the receiver
 Installations where use of existing network cabling reduces installation costs
Key specifications
 Model: StarTech.com ST121HD20L
 Maximum resolution: 3840 x 2160 (4K) at 60Hz; supports 3D
 Transmission distance: up to 330 ft (100 m) for 4K; up to 460 ft (140 m) for 1080p
 Cable type: single CAT6 (non-proprietary)
 HDCP: compliant with HDCP 2.2 and backward compatible
 Power: AC input 110–240 V, output current 2 A
 Dimensions: 111 x 76 x 26 mm
 Includes: transmitter and receiver units, mounting brackets
How to use
Connect the HDMI source to the transmitter unit and the display to the receiver unit using standard HDMI cables. Link the transmitter and receiver with a single CAT6 cable run up to the supported distance. Connect both units to power (110–240 V). If IR control is needed, connect the IR emitters/receivers to the corresponding IR ports to enable remote control of the source from the receiver location. Verify HDCP settings on source devices if protected content is not displayed.
Usage recommendations
For best results use shielded CAT6 cabling in good condition and avoid running the cable alongside high-voltage power lines. For longer 1080p runs (up to 460 ft / 140 m) ensure connectors and cable terminations meet category standards. Keep firmware and source device settings compatible with HDCP 2.2 when transmitting protected 4K content.

## Specifications

### Ports & interfaces

| Feature | Value |
|---|---|
| HDMI in | 1 |
| Number of HDMI outputs | 1 |
| RJ-45 input ports | 1 |
| RJ-45 output ports | 1 |
| Serial ports quantity | 2 |
| DC-in jack | Yes |
| Remote (IR) input | 2 |
| Remote (IR) output | 2 |
| Connectivity technology | Wired |

### Power

| Feature | Value |
|---|---|
| External power adapter | Yes |
| Output current | 2 A |
| Operating voltage | 5 V |
| AC input voltage | 110 - 240 |
| Power plug type | Type M |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.271 kg |
| Height | 26 mm |
| Width | 111 mm |
| Depth | 76 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 0 - 95 |
| Storage temperature (T-T) | -15 - 55 |
| Operating temperature (T-T) | -5 - 40 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 1424 g |
| Package depth | 185 mm |
| Package height | 95 mm |
| Package width | 248 mm |

### Packaging content

| Feature | Value |
|---|---|
| AC adapter included | Yes |
| Cables included | LAN (RJ-45) |
| Quick start guide | Yes |
| Mounting brackets included | Yes |
| Included power plug types | UK, NA, JP, EU, ANZ |

### Features

| Feature | Value |
|---|---|
| Type | AV transmitter & receiver |
| Maximum resolution | 3840 x 2160 |
| Cable types supported | Cat6 |
| Maximum transfer distance | 140 m |
| Material | Metal |
| Product colour | Black |
| Audio output channels | 7.1 |
| Supported graphics resolutions | 1280 x 720 (HD 720), 2560 x 1600 (WQXGA), 1920 x 1200 (WUXGA), 1920 x 1080 (HD 1080) |
| HDCP | Yes |
| Maximum refresh rate | 60 Hz |
| Chipset | Norelsys NS 5730, NS5731 |
| LED indicators | Link, Power |
| HDCP version | 1.4/2.2 |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 280 mm |
| Master (outer) case width | 520 mm |
| Master (outer) case length | 420 mm |
| Products per master (outer) case | 10 pc(s) |

## FAQ

### How much does the AV transmitter & receiver StarTech.com ST121HD20L cost, and is it available for purchase?

The price is 465.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 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 07.07.2026 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: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### 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 StarTech 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 StarTech 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, rj-45 input ports, rj-45 output ports, weight, type, maximum resolution, maximum transfer distance, cable types supported, 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 AV transmitter & receiver StarTech.com ST121HD20L?

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/3093067/64202789_large.webp