FREE SHIPPING on orders over $200 Australia Wide - some exclusions apply, click here for more details
NSW Lockdown: Our stores are open for your essential office equipment, with restrictions. Free Shipping* available Australia Wide on most orders over $200. Please allow for some delay in order processing and shipping. Please click here for more information.

Startech HDMI over CAT6 Extender

Item No:
Delivery: Pre-order ETA 23/11/21
Pickup: Check availability
Payment options
4K HDMI Balun; Visually Lossless Compression; IR Support; HDMI over CAT6 Extender; 4K 60Hz

This HDMI® over CAT6 extender lets you transmit your HDMI signal over a CAT6 cable up to 330 ft. (100 m) away. The extender supports Ultra HD 4K with support for 3D and the accompanying digital audio.

Long-Distance Transmission

Extend your HDMI signal to up to 330 ft. (100 m) with This HDMI over Ethernet extender. Use your existing CAT6 cable infrastructure with a direct connection to the converter for an easy run through walls and ceilings, saving you on installation costs.

The extender also works to extend an infrared (IR) signal, enabling you to control your video source from the remote location.

Astonishing 4K Picture Quality

This HDMI Ethernet extender supports a 4K 60Hz (3840 x 2160) UHD resolution, providing four times the picture quality of high-definition (1080p), ensuring a crystal-clear picture that's ideal for displaying your 4K video content in office buildings, airports, retail settings and more.

Plus, because the extender supports 1080p and lower resolutions at up to 460 feet away, you can comfortably use This extender to make any video source look great.

Compatible with HDCP 2.2 Devices

Connect your HDMI devices and displays with confidence, knowing This extender is HDCP 2.2 compliant. This lets you harness the capabilities of HDMI-enabled devices such as Blu-ray players or online streaming devices in higher resolutions. It is also backward compatible with previous generations of HDMI and HDCP.

ST121HD20L is backed by 2-year Startech warranty with free lifetime technical support.

Connector A3.5 mm Mini-Jack (3 Position) Female
3.5 mm Mini-Jack (3 Position) Female Input
3.5 mm Mini-Jack (3 Position) Female Output
HDMI (19 pin) Female
RJ-45 Female
Connector B3.5 mm Mini-Jack (3 Position) Female
3.5 mm Mini-Jack (3 Position) Female Input
3.5 mm Mini-Jack (3 Position) Female Output
HDMI (19 pin) Female
RJ-45 Female
Humidity0% - 95 % RH (No Condensation)
Operating Temperature-5


Type Characteristics of the device.
AV transmitter & receiver
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.
3840 x 2160 pixels
Cable types supported
Maximum transfer distance The greatest distance over which the data/signal can be transferred.
140 m
Chipset Set of electronic components in an integrated circuit that manages the data flow between the processor, memory and peripherals. It is usually found in the motherboard of a computer. Chipsets are usually designed to work with a specific family of microprocessors. Because it controls communications between the processor and external devices, the chipset plays a crucial role in determining system performance.
Norelsys NS 5730, NS5731
Maximum refresh rate
60 Hz
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 channels
LED indicators
Supported graphics resolutions The graphic resolutions that can be displayed by the device. The graphic resolution describes the width and height dimensions of a display, such as a computer monitor, measured in pixels.
1280 x 720 (HD 720),1920 x 1080 (HD 1080),1920 x 1200 (WUXGA),2560 x 1600 (WQXGA)
HDCP High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection to prevent copying of digital audio and video content as it travels across connections.
Material The material from which a thing is or can be made e.g. wood, plastic.
HDCP version
Product colour The colour e.g. red, blue, green, black, white.

Ports & interfaces

Connectivity technology The technology that enables connectivity of the device, e.g. wired or wireless.
RJ-45 input ports
RJ-45 output ports
HDMI in Port (socket) for HDMI input.
Number of HDMI outputs Port (socket) for HDMI output.
Serial ports quantity The number of serial ports in a computer or peripheral. A serial port is a serial communication physical interface through which information transfers in or out one bit at a time. The term "serial port" usually identifies hardware more or less compliant to the RS-232 standard, intended to interface with a modem or with a similar communication device. In modern computers and peripherals, serial ports have largely been replaced by USBs and other interfaces.
Remote (IR) input
Remote (IR) output
DC-in jack The socket/plug where the DC electricity supply connects to the device.


AC input voltage The voltage of the AC electricity that is inputted into the product.
110 - 240 V
Operating voltage Defines the range of operating voltages available
5 V
Output current
2 A
External power adapter
Power plug type
Type M

Operational conditions

Operating temperature (T-T) The minimum and maximum temperatures at which the product can be safely operated.
-5 - 40 °C
Storage temperature (T-T) The minimum and maximum temperatures at which the product can be safely stored.
-15 - 55 °C
Operating relative humidity (H-H)
0 - 95%

Weight & dimensions

Width The measurement or extent of something from side to side.
111 mm
Depth The distance from the front to the back of something.
76 mm
Height The measurement of the product from head to foot or from base to top.
26 mm
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.
271 g

Packaging data

Package width The distance from one side of the packaging to the other.
248 mm
Package depth The distance from the front to the back of the packaging.
185 mm
Package height The distance from the top to the bottom of the packaging.
95 mm
Package weight Weight of the packaged product.
1.42 kg

Packaging content

AC adapter included
Cables included
LAN (RJ-45)
Included power plug types
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.
Mounting brackets included

Logistics data

Master (outer) case width
52 cm
Master (outer) case length
42 cm
Master (outer) case height
28 cm
Quantity per master (outer) case
10 pc(s)
SKU 402381
Brand Startech
Product Condition Brand New/Unused
Adapter Type HDMI Adapter
Product Use General