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header-product AV transmitter & receiver StarTech.com ST121HDBTDK
455.49 €

AV transmitter & receiver StarTech.com ST121HDBTDK

AV transmitter & receiver StarTech.com ST121HDBTDK Photo 1
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AV transmitter & receiver StarTech.com ST121HDBTDK Photo 1
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Short description

The StarTech.com 4K HDMI Extender with Compact Transmitter supports UHD 4K resolution up to 4096 x 2160 pixels. It utilizes HDBaseT technology for reliable wired connectivity over Cat5e or Cat6 cables. With an AC input voltage range of 100-240 V and operating voltage of 12 V, it is designed for versatility. Compact dimensions of 68 mm x 80 mm x 25 mm make it easy to integrate into any setup.
Available at price 455.49 €: 4 pcs.
Total available for order: 12 pcs.
Warranty: 2 Years
SKU: 294368
Manufacturer: StarTech
Charging device included Charging device included
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
08.10.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
13.10.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.93 kg)
Parcel couriers
Unisend LV / Venipak Pickup LV / Venipak Locker LV / DPD Paku skapis / Omniva LV / Latvijas Pasts pakomāts / Latvijas Pasts nodaļa
13.10.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
payment
Payment Methods:
Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay
Available for private customers at price 478.99 €: 4 pcs.
Together cheaper
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Product information

Description

The StarTech.com AV transmitter & receiver ST121HDBTDK is a 4K HDMI extender kit that uses HDBaseT technology to transmit HDMI A/V signals over a single CAT cable up to 70 m (230 ft.). The compact transmitter includes a built-in HDMI cable and is USB-powered from the source device, while the receiver includes mounting hardware for a discreet installation. The kit supports UHD 4K video (up to 4096 x 2160) and 7.1 audio and is compatible with CAT5e, CAT6 and CAT7 cabling.

Advantages

The ST121HDBTDK provides a simple, space-saving installation with a small, USB-powered transmitter that connects directly to the source via its integrated HDMI lead. It maintains 4K picture quality at distances up to 40 m (130 ft.) and supports 1080p and lower resolutions up to 70 m (230 ft.), while also carrying 7.1 audio channels. Using a single CAT cable reduces cabling complexity and potential failure points compared with dual-cable extenders.

Suitable for

  • Digital signage and public displays
  • Conference rooms and meeting spaces
  • Home theatre or media room distribution
  • AV installations where discreet, wall- or rack-mounted receivers are required

Key specifications

  • Type: AV transmitter & receiver
  • Maximum resolution: 4096 x 2160 (4K UHD)
  • Maximum transfer distance: up to 70 m (230 ft.) over CAT5e/CAT6 (4K up to 40 m / 130 ft.)
  • Audio: 7.1 channels
  • HDMI in: 1; HDMI out: 1
  • RJ-45 ports: 1 input, 1 output
  • Cable types supported: Cat6, Cat5e, Cat7
  • Colour: Black
  • Weight: 0.252 kg
  • Manufacturer part number (MPN): ST121HDBTDK
  • EAN: 0065030864916

How to use

Connect the transmitter's built-in HDMI cable to your source device and power the transmitter from a USB port on that source. Run a single CAT5e/CAT6/CAT7 cable from the transmitter to the receiver and connect the receiver to the display via HDMI. Use the included mounting hardware to install the receiver where required. Verify video resolution settings on the source to match the display and ensure cable runs do not exceed the supported distances for the desired resolution.

Usage recommendations

For reliable 4K performance, use high-quality Cat6 or Cat7 cable and keep the run at or below 40 m (130 ft.). For 1080p or lower resolutions, Cat5e/Cat6 can be used for runs up to 70 m (230 ft.). Avoid running HDMI-over-CAT cables parallel to high-voltage power lines to reduce interference.

Specifications

Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.
Wired
Maximum resolution: The maximum number of pixels that can be displayed in the image. It is usually quoted as width × height,: for example, "1024 × 768" means the width is 1024 pixels and the height is 768 pixels.
4096 x 2160
Type: Characteristics of the device.
AV transmitter & receiver
All features

Technical details

Sustainability certificates:
RoHS

Packaging content

Mounting kit:
Yes
Quick start guide: Instructions, either online, as a computer program or in paper form, to allow you to set up and start using the product quickly.
Yes
Included power plug types:
UK, NA, EU, ANZ
Cables included:
USB
AC adapter included:
Yes

Packaging data

Package weight: Weight of the packaged product.
1600 g
Package height: The distance from the top to the bottom of the packaging.
74 mm
Package depth: The distance from the front to the back of the packaging.
293 mm
Package width: The distance from one side of the packaging to the other.
196 mm

Weight & dimensions

Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
0.252 kg
Height: The measurement of the product from head to foot or from base to top.
25 mm
Depth: The distance from the front to the back of something.
80 mm
Width: The measurement or extent of something from side to side.
68 mm

Operational conditions

Operating relative humidity (H-H):
0 - 80
Storage temperature (T-T): The minimum and maximum temperatures at which the product can be safely stored.
-10 - 60
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
0 - 40

Power

Power plug type:
Type M
External power adapter:
Yes
Power consumption (typical): Amount of power consumed by this model, often expressed in watts (W). Typical values that manufacturers give are power consumption when off, standby/suspended mode, typical use, maximum usage.
18 W
Output current:
1.5 A
Input current:
0.6
Operating voltage: Defines the range of operating voltages available
12 V
AC input voltage: The voltage of the AC electricity that is inputted into the product.
100-240

Ports & interfaces

HDMI in: Port (socket) for HDMI input.
1
Number of HDMI outputs: Port (socket) for HDMI output.
1
RJ-45 output ports:
1
RJ-45 input ports:
1
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.
Wired

Features

Certification:
CE, FCC, TAA, REACH
HDBaseT certified:
Yes
Product colour: The colour e.g. red, blue, green, black, white.
Black
Rack mounting: The type of mounting that can position devices in a shelving system (rack).
Yes
Plug and Play: Indicates whether this product supports is "plug and play". Plug and play is hardware or software that, after being installed ("plugged in"), can immediately be used ("played with"), as opposed to hardware or software which requires configuration.
Yes
Cable length: How long the cable is.
0.1 m
LED indicators:
Status
Daisy chain:
No
Audio output channels: An audio output channel is an electric circuit which acts as a path for a signal produced by a device. A device may have several audio output channels.
7.1
Audio system: System used to play music or speech.
Multichannel
Maximum transfer distance: The greatest distance over which the data/signal can be transferred.
70 m
Cable types supported:
Cat6, Cat5e
Maximum resolution: The maximum number of pixels that can be displayed in the image. It is usually quoted as width × height,: for example, "1024 × 768" means the width is 1024 pixels and the height is 768 pixels.
4096 x 2160
Type: Characteristics of the device.
AV transmitter & receiver

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Stock data
Warehouse Stock Delivery to the store Store Price
WH354 4 24.09.2026 Best delivery
478.99 €
Available only for legal entities
Warehouse Stock Delivery to the store Store Price
WH109 4 08.10.2026
455.49 € Best price
EU9 4 24.09.2026 Best delivery
471.49 €
478.99 €
Stock: 4
Delivery Date: 24.09.2026 Best delivery
Warehouse: WH354
Available only for legal entities
455.49 €
Stock: 4
Delivery Date: 08.10.2026
Warehouse: WH109
471.49 €
Stock: 4
Delivery Date: 24.09.2026 Best delivery
Warehouse: EU9

Customer reviews

Customer questions

FAQ

How much does the AV transmitter & receiver StarTech.com ST121HDBTDK cost, and is it available for purchase?

The price is 455.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 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 08.10.2026 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: connectivity technology, maximum resolution, type, 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 ST121HDBTDK?

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.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.