# AV transmitter & receiver StarTech.com ST121HD20V 4K 60Hz HDMI over CAT6

**URL:** https://aio.lv/en/product--startech-st121hd20v--10973987
**Data updated:** 2025-12-30 15:00 (EET)
**Category:** Audio & Video Extenders
**Manufacturer:** StarTech
**Manufacturer code:** ST121HD20V
**EAN:** 0065030880084
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 159.49 €
**Prices and availability valid until:** 2026-07-07 23:59
**Price without VAT (21%):** 131.81 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-st121hd20v--10973987

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The StarTech.com ST121HD20V HDMI over CAT6 Extender Kit supports 4K resolution at 60Hz. It allows you to extend HDMI signals over Cat6 cables, ensuring high-quality video transmission. The kit includes a transmitter and receiver, operating on a wide input voltage range of 100-240V. Compact design with dimensions of 70mm width, 97mm depth, and 13mm height makes it easy to integrate into various setups.

## Long description

The StarTech.com ST121HD20V HDMI over CAT6 extender kit transmits 4K 60Hz (3840 x 2160) signals up to 165 ft (50 m) over a single Cat6 cable and includes both a transmitter and receiver with a local HDMI output. It supports HDMI 2.0 features including 4:4:4 chroma subsampling, High Dynamic Range (HDR), and HDCP 2.2 compatibility, and is powered from a wide 100–240V input range. The compact black units are suitable for installations where long-distance HDMI distribution is required.
Advantages
The kit delivers four times the detail of 1080p by supporting 4K at 60Hz and preserves color fidelity with 4:4:4 chroma subsampling. HDR support increases contrast and brightness for more accurate images, while HDCP 2.2 compliance ensures compatibility with protected sources. Using a single Cat6 cable for transmission simplifies installation and reduces infrastructure costs, and the kit includes both transmitter and receiver for a complete solution.
Suitable for
Extending HDMI sources such as Blu-ray players or streaming devices to remote displays
Digital signage installations in retail, hospitality, or corporate environments
Home theatre setups requiring long cable runs through walls or ceilings
Key specifications
Model: StarTech.com ST121HD20V
Maximum resolution: 3840 x 2160 at 60Hz (4K 60Hz)
Chroma subsampling: 4:4:4
HDR support: Yes
HDCP compliance: HDCP 2.2 (backward compatible)
Maximum transfer distance: 50 m (165 ft) over Cat6
Cable types supported: Cat6
HDMI inputs/outputs: 1 HDMI in, 2 HDMI outputs (including local HDMI output)
RJ‑45 ports: 1 input, 1 output
Power input: 100–240V
Colour: Black
Weight: 0.156 kg
How to use
Connect the HDMI source (for example a Blu-ray player or streaming device) to the transmitter HDMI input and connect the receiver local HDMI output to the display. Use a single Cat6 cable to link the transmitter and receiver over distances up to 50 m (165 ft). Ensure both units are powered from an appropriate 100–240V supply. For protected content, confirm connected devices support HDCP 2.2.
Usage recommendations
For best results use solid Cat6 cabling rated for in‑wall installation and avoid running the cable alongside strong sources of electromagnetic interference. Verify cable terminations and use short HDMI patch cables for local connections to minimise signal loss.

## Specifications

### Technical details

| Feature | Value |
|---|---|
| Sustainability certificates | RoHS |

### Ports & interfaces

| Feature | Value |
|---|---|
| HDMI in | 1 |
| Number of HDMI outputs | 2 |
| RJ-45 input ports | 1 |
| RJ-45 output ports | 1 |
| HDMI version | 2.0 |
| Connectivity technology | Wired |

### Power

| Feature | Value |
|---|---|
| Input current | 0.3 |
| Output current | 1 A |
| AC input voltage | 100 - 240 |
| Power plug type | Type M |
| Operating voltage (transmitter) | 12 V |
| Operating voltage (receiver) | 12 V |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.156 kg |
| Height | 13 mm |
| Width | 70 mm |
| Depth | 97 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 0 - 80 |
| Storage temperature (T-T) | -20 - 60 |
| Operating temperature (T-T) | 0 - 40 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 777 g |
| Package depth | 220 mm |
| Package height | 70 mm |
| Package width | 130 mm |

### Packaging content

| Feature | Value |
|---|---|
| Quick start guide | Yes |
| IR blaster included | Yes |
| Included power plug types | UK, ANZ, EU, JP, NA |
| IR receiver included | Yes |

### Features

| Feature | Value |
|---|---|
| Type | AV transmitter & receiver |
| Maximum resolution | 3840 x 2160 |
| Cable types supported | Cat6 |
| Maximum transfer distance | 50 m |
| Certification | CE, FCC, REACH |
| Product colour | Black |
| Audio output channels | 7.1 |
| Supported graphics resolutions | 3840 x 2160, 2560 x 1600 (WQXGA), 1920 x 1200 (WUXGA), 1920 x 1080 (HD 1080), 1280 x 720 (HD 720) |
| HDCP | Yes |
| Maximum refresh rate | 60 Hz |
| HDCP version | 2.2 |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 282 mm |
| Master (outer) case width | 375 mm |
| Master (outer) case length | 457 mm |
| Products per master (outer) case | 20 pc(s) |
| Harmonized System (HS) code | 85176200 |

## FAQ

### How much does the AV transmitter & receiver StarTech.com ST121HD20V cost, and is it available for purchase?

The price is 159.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 20 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 08.07.2026 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. 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 ST121HD20V?

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/10973987/61396649_large.webp