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Restock 19-Jun-2026 Estimated, Out of Stock Prices are Estimated.

425.35 Incl Vat




Overview

Range/Series Overview


IMPORTANT: This Range/Series overview section describes the range of which this product belongs. Features of different versions might be mentioned and may not apply to the specific product on this page. Please view Specs for specification of product.

Connect four video sources to a remote HDMI display over CAT5/CAT6 cabling, and easily scale and switch between HDMI, DP or VGA video sources. This multi-input HDBaseT extender kit extends your A/V signals to a remote location up to 230 ft. (70 m) away. It features a built-in switch and scaler, so you can choose which video source is output from four independent video sources (2 x HDMI, 1 x VGA and 1 x DisplayPort).

Seamless Integration and Operation

The HDBaseT extender's built-in converter switch lets you connect two HDMI sources, a VGA source, and a DP source to the same remote and local HDMI display. You don't need adapters or scalers, or a video switch.

Along with manually switching your video source with easy-to-use buttons, the video extender ensures hassle-free operation with two auto-switching modes: auto-detect switching, which detects and selects a newly connected device, and priority selection, which lets you choose which port is activated by default, for automatic switching.

Built-In Video Scaling

This HDBaseT extender features a built-in scaler that scales the image to 1080p, so you can rest assured your HDMI display will intuitively work with any source that's connected through it. Scaling is easy to do, with an intuitive OSD that's accessible using buttons on the remote receiver. Newer HDMI displays no longer support legacy resolution video signals. Without support for these common VGA resolutions, your source may not work with your new HDMI display.

High-Definition 1080p Video at 230 Feet (70 Meters)

The extender kit maintains your HD picture quality, even at 230 ft. (70 m) away from your video source, ensuring you can provide the best possible viewing experience.

The ST121HDBTSC is backed by a 2-year StarTech.com warranty and free lifetime technical support.


Features Summary

  • Robust connectivity options
    Equipped with multiple connector types including 19-pin HDMI Type-A, HD-15 for VGA, and mini jack for audio, this extender kit ensures compatibility with a wide variety of devices.
  • Long-distance transmission
    The extender can transmit video and audio signals up to 70 m over CAT 6 cable, allowing for flexibility in installation without loss of quality.
  • KVM support
    It supports a maximum video resolution of 1920 x 1200, making it suitable for high-definition displays and providing an exceptional viewing experience.
  • Environmentally compliant
    The product adheres to TAA, RoHS, and WEEE standards, reflecting a commitment to environmental sustainability during manufacturing and disposal.
  • External power adapter
    The kit operates with a power consumption of 18 watts, powered by an external power adapter, ensuring reliable performance for extended use.

Specification Summary

Product Description
Startech Multi-Input HDBaseT Extender Kit - Built-In Switch and Video Scaler - DisplayPort HDMI and VGA Over CAT6 or CAT5e (ST121HDBTSC) - video/audio/infrared/network extender - HDMI, DisplayPort, HDBaseT, VGA - TAA Compliant
Device Type
Video/audio/infrared/network extender
Form Factor
External
Localisation
Australia, Japan, New Zealand, United Kingdom, Europe, North Asia
Data Link Protocol
HDMI, DisplayPort, HDBaseT, VGA
Transmission Medium
CAT 6
Max Transfer Distance
70 m
Dimensions (WxDxH)
6.1 cm x 10.6 cm x 6.7 cm
Weight
145 g
TAA Compliant
Yes
Manufacturer Warranty
2-year warranty

Specifications

EAN / GTIN:
0065030879200
General
Device Type
Video/audio/infrared/network extender
Form Factor
External
Localisation
Australia, Japan, New Zealand, United Kingdom, Europe, North Asia
Networking
Connectivity Technology
Wired
Data Link Protocol
HDMI, DisplayPort, HDBaseT, VGA
Max Resolution
1920 x 1200
Max Transfer Distance
70 m
Status Indicators
Status
Expansion / Connectivity
Interfaces
1 x HDBaseT - RJ-45 ¦ 2 x HDMI (input) - 19 pin HDMI Type A ¦ 1 x DisplayPort (input) ¦ 1 x VGA (input) - HD-15 female ¦ 1 x audio - mini jack ¦ 1 x IrDA
Miscellaneous
Included Accessories
Remote control, IR receiver, IR transmitter, rubber feet, mounting brackets
Cables Included
1 x RJ-11 to RS-232 adapter ¦ 1 x RJ-11 phone cable ¦ 1 x network cable
Compliant Standards
RoHS, WEEE
TAA Compliant
Yes
Power
Power Device
External power adapter
Power Consumption Operational
18 Watt
Dimensions & Weight
Width
6.1 cm
Depth
10.6 cm
Height
6.7 cm
Weight
145 g
Dimensions & Weight (Shipping)
Shipping Weight
195 g
Manufacturer Warranty
Service & Support
Limited warranty - 2 years
Environmental Parameters
Min Operating Temperature
0 °C
Max Operating Temperature
40 °C
Humidity Range Operating
0 - 80% (non-condensing)

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