# HDMI over CAT6 Extender Kit StarTech ST121HD20V — 4K 60Hz, HDMI transmitter & receiver, Cat6, 12V

**URL:** https://aio.lv/en/product--startech-st121hd20v--2106624
**Data updated:** 2026-03-07 11:03 (EET)
**Category:** Monitor & Display Cables
**Manufacturer:** StarTech
**Manufacturer code:** ST121HD20V
**EAN:** 0065030880084
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 183.99 €
**Prices and availability valid until:** 2026-07-04 23:59
**Price without VAT (21%):** 152.06 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-st121hd20v--2106624

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 19.06.2026 | free |
| Pickup points | 26.06.2026 | 1.99 EUR |
| Courier delivery to door | 26.06.2026 | 4.99 EUR |

## Summary description

Wired HDMI over CAT6 extender kit StarTech ST121HD20V includes an AV transmitter and receiver for extending HDMI signals up to 3840×2160 at 60Hz over Cat6 cable. Designed for AV distribution, digital signage and remote displays, it requires 12 V operating voltage on the transmitter and supports AC input 100–240 V. Compact black units with low weight for installations.

## Long description

The StarTech ST121HD20V HDMI over CAT6 Extender Kit includes a transmitter and receiver pair that extends HDMI signals up to 4K (3840×2160) at 60Hz over a single Cat6 cable. The compact black units provide a local HDMI output on the transmitter and are designed for AV distribution, digital signage and remote display installations. The transmitter requires a 12 V supply while the kit supports AC input 100–240 V for external power. The units are lightweight and intended for easy mounting in ceilings, walls or AV racks.
Advantages
This extender supports HDMI 2.0 features including 4:4:4 chroma subsampling and High Dynamic Range (HDR), enabling accurate color reproduction and increased contrast for high-quality video content. It can transmit 4K 60Hz signals up to 50 m (165 ft) over a single Cat6 cable, reducing the need for long HDMI cables and simplifying installation through existing cabling paths. The kit is HDCP 2.2 compatible and backward compatible with earlier HDMI/HDCP versions, and it includes compact, low-weight units suitable for discreet installation.
Suitable for
Digital signage in retail, hospitality or transportation hubs
Conference rooms, lecture halls and meeting spaces
Remote TV or display installations where long HDMI runs are impractical
Home theater or media player distribution using existing Cat6 infrastructure
Key specifications
Maximum resolution: 3840×2160 at 60Hz (4K 60Hz)
HDMI version: HDMI 2.0 features (4:4:4 chroma subsampling)
HDR support for increased contrast and color range
Maximum cable distance over Cat6: 50 m (165 ft)
Audio support: multi-channel audio including 7.1 formats
Local HDMI output on the transmitter for a nearby display
Power: transmitter requires 12 V; unit accepts 100–240 V AC via adapter
Color: black; weight: approximately 0.156 kg per unit
How to use
Connect the HDMI source (for example a Blu‑ray player, streaming box or PC) to the transmitter's HDMI input and attach the local HDMI output if a nearby display is required. Run a single Cat6 cable from the transmitter to the receiver up to 50 m (165 ft). Connect the receiver's HDMI output to the remote display. Provide 12 V power to the transmitter as specified and power the receiver per the included adapter instructions. Ensure HDMI cables, source and display devices support the intended resolution and HDCP requirements.
Usage recommendations
For best performance, use solid-core Cat6 cable with good terminations and keep runs away from high-power electrical cabling to minimize interference. Verify that source and display devices support 4K 60Hz and HDCP 2.2 when transmitting protected content. For installations through walls or ceilings, follow local electrical and building codes and use appropriate mounting hardware.

## Specifications

| Feature | Value |
|---|---|
| Type | AV transmitter & receiver |
| Connectivity technology | Wired |
| Audio output channels | 7.1 |
| Input current | 0.3 |
| Output current | 1 A |
| Quick start guide | Yes |
| HDMI in | 1 |
| Number of HDMI outputs | 2 |
| Cable types supported | Cat6 |
| AC input voltage | 100 - 240 |
| Maximum transfer distance | 50 m |
| RJ-45 input ports | 1 |
| RJ-45 output ports | 1 |
| Power plug type | Type M |
| IR blaster included | Yes |
| Included power plug types | ANZ, EU, JP, NA, UK |
| IR receiver included | Yes |
| Operating voltage (transmitter) | 12 V |
| Operating voltage (receiver) | 12 V |

### Features

| Feature | Value |
|---|---|
| Product colour | Black |
| Maximum resolution | 3840 x 2160 |
| Supported graphics resolutions | 1280 x 720 (HD 720), 1920 x 1080 (HD 1080), 1920 x 1200 (WUXGA), 2560 x 1600 (WQXGA), 3840 x 2160 |
| HDMI version | 2.0 |
| HDCP | Yes |
| Maximum refresh rate | 60 Hz |
| HDCP version | 2.2 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.156 kg |

### Operational conditions

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

### 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 |

### Other features

| Feature | Value |
|---|---|
| Height | 13 mm |
| Width | 70 mm |
| Depth | 97 mm |

### Certificates

| Feature | Value |
|---|---|
| Certification | CE, FCC, REACH |
| Compliance certificates | RoHS |

### Packaging data

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

## FAQ

### How much does the StarTech HDMI over CAT6 Extender Kit ST121HD20V cost, and is it available for purchase?

The price is 183.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 14 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 19.06.2026 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. All transactions are 100% secure and encrypted.

### Can StarTech HDMI over CAT6 Extender Kit ST121HD20V 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 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: weight, 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 HDMI over CAT6 Extender Kit 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/2106624/64792865_large.webp