# AV transmitter & receiver StarTech.com ST121USBHD HDMI over CAT6 Extender 165 ft 1080p

**URL:** https://aio.lv/en/product--startech-st121usbhd--10973707
**Data updated:** 2025-12-30 15:00 (EET)
**Category:** Audio & Video Extenders
**Manufacturer:** StarTech
**Manufacturer code:** ST121USBHD
**EAN:** 0065030862363
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 272.49 €
**Prices and availability valid until:** 2026-07-09 23:59
**Price without VAT (21%):** 225.20 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-st121usbhd--10973707

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 26.06.2026 | free |
| Pickup points | 01.07.2026 | 1.99 EUR |
| Courier delivery to door | 01.07.2026 | 4.99 EUR |

## Summary description

The StarTech.com ST121USBHD is an HDMI over CAT6 extender that supports 1080p resolution up to 165 ft (50m). It features a 4-port USB hub, wired connectivity, and supports Cat5, Cat5e, and Cat6 cables. The device operates at 5V with a typical power consumption of 5W. Compact dimensions make it easy to integrate into various setups.

## Long description

The StarTech.com ST121USBHD HDMI over CAT6 extender transmits 1080p (up to 1920x1200) video and 7.1 digital audio from a source to a remote HDMI display at distances up to 165 ft (50 m) using shielded CAT6 cable. The kit includes a transmitter and receiver pair and integrates a built-in 4-port USB 2.0 hub to connect remote USB peripherals at the display location. It supports Cat6, Cat5e and Cat5 cabling and is suitable for installations requiring extended HDMI and USB connectivity.
Advantages
The extender preserves uncompressed 1080p video quality and multichannel audio at long distances and provides seamless remote USB connectivity via an integrated 4‑port USB 2.0 hub. It passes EDID information and automatically adjusts video equalization for plug-and-play setup without additional drivers. The kit is TAA compliant, includes mounting hardware for a tidy installation and is covered by a 2-year StarTech.com warranty with lifetime technical support.
Suitable for
Digital signage and remote displays in retail, shopping centres and hospitals
Point-of-sale (POS) kiosks with touchscreen or USB input devices
Conference rooms and lecture halls requiring remote HDMI and USB access
Setups where HDMI and multiple USB peripherals must be located separately from the source
Key specifications
Model: StarTech.com ST121USBHD
Maximum resolution: up to 1920x1200 / 1080p
Maximum transfer distance: 50 m (165 ft) using shielded CAT6
Cable types supported: Cat6, Cat5e, Cat5 (max distance reduced with unshielded or lower-grade cable)
USB: 4× USB 2.0 ports (remote hub)
HDMI ports: 1 input, 1 output
RJ-45 ports: 2 input, 2 output
Power: 5V, typical power consumption 5W
Colour: Black
Compliance: TAA
Weight: 0.46 kg
How to use
Connect the transmitter unit to the HDMI source and the receiver unit to the remote HDMI display. Link the units using shielded CAT6 cable for maximum distance (50 m); using unshielded CAT6 reduces maximum distance to 30 m and Cat5 to 15 m. Attach remote USB devices to the receiver’s 4 USB 2.0 ports to enable remote access or control of the source. Power both units with the supplied power adapters, then verify EDID and video signal automatically through plug-and-play operation. Mount the units using the included mounting hardware if a fixed installation is required.
Usage recommendations
For optimal performance use shielded CAT6 cable and keep cable runs away from sources of electrical interference. Ensure connected USB peripherals comply with USB 2.0 power and bandwidth limitations; high-power devices may require their own power supply. If longer distances or different features are required, verify cable quality and installation environment before deployment.

## Specifications

### Technical details

| Feature | Value |
|---|---|
| Audio support | Yes |
| Sustainability certificates | RoHS |

### Ports & interfaces

| Feature | Value |
|---|---|
| HDMI in | 1 |
| Number of HDMI outputs | 1 |
| RJ-45 input ports | 2 |
| RJ-45 output ports | 2 |
| USB connector type | Mini-USB B, USB Type-A |
| USB ports quantity | 7 |
| Connectivity technology | Wired |

### Power

| Feature | Value |
|---|---|
| Power consumption (typical) | 5 W |
| External power adapter | Yes |
| Output current | 1 A |
| Operating voltage | 5 V |
| Power plug type | Type N |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.46 kg |
| Height | 21 mm |
| Width | 82 mm |
| Depth | 82 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 0 - 80 |
| Storage temperature (T-T) | -10 - 60 |
| Operating temperature (T-T) | 0 - 40 |

### Packaging data

| Feature | Value |
|---|---|
| Package dimensions (WxDxH) | 175 x 306 x 74 |
| Package weight | 1067 g |
| Package depth | 180 mm |
| Package height | 71 mm |
| Package width | 309 mm |

### Packaging content

| Feature | Value |
|---|---|
| AC adapter included | Yes |
| Cables included | USB, LAN (RJ-45) |
| Quick start guide | Yes |

### Features

| Feature | Value |
|---|---|
| Type | AV transmitter & receiver |
| Cable types supported | Cat6, Cat5e, Cat5 |
| Maximum transfer distance | 50 m |
| Certification | CE, FCC, TAA, REACH |
| Colour depth | 48 bit |
| Product colour | Black |
| Supported video modes | 1080p |
| Maximum refresh rate | 60 Hz |
| Carrier frequency | 38 kHz |

## FAQ

### How much does the AV transmitter & receiver StarTech.com ST121USBHD cost, and is it available for purchase?

The price is 272.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 13 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 26.06.2026 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. 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 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 ST121USBHD?

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/10973707/61396386_large.webp