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HDBaseT HDMI extender kit with 100m Full HD reach
Extend HDMI over one CAT5e/CAT6 cable with HDBaseT and Power over Cable, supporting 4K 30Hz up to 35m and 1080p 60Hz up to 100m.

Key capabilities
100m Full HD reach
Supports 1080p 60Hz to 100m / 330ft.
4K 30Hz support
Supports 4096×2160 at 30Hz to 35m.
Power over Cable
The transmitter/receiver pair can operate from one power source.
Single CAT5e/CAT6 run
HDBaseT reduces the point-to-point cable run to one compatible twisted-pair cable.
What to know before buying
Maximum distance depends on resolution: the exact table specifies 4K 30Hz to 35m and 1080p 60Hz to 100m.
Australian version and manufacturer warranty
This item is the Australian version supplied by DeviceDeal and is covered by the official StarTech.com 2-year manufacturer warranty in Australia.
Please retain your DeviceDeal tax invoice as proof of purchase. Warranty coverage and claims are subject to StarTech.com warranty terms, eligibility requirements and product assessment.
Frequently asked questions
How far can it extend 1080p?
How far can it extend 4K?
What cabling is supported?
Does it support Power over Cable?
Does it support 7.1 audio?
How many extender units are included?
Is a power adapter included?
What warranty applies in Australia?
(ST121HDBTPW)
Features and highlights
100m Full HD reach
Supports 1080p 60Hz to 100m / 330ft.
4K 30Hz support
Supports 4096×2160 at 30Hz to 35m.
Power over Cable
The transmitter/receiver pair can operate from one power source.
Single CAT5e/CAT6 run
HDBaseT reduces the point-to-point cable run to one compatible twisted-pair cable.
- 4K 30Hz to 35m
- 1080p to 100m
- HDBaseT + POC
- 2-year warranty
Specifications
Verified specifications for StarTech ST121HDBTPW.

Warranty Information
| Warranty | 2 Years |
|---|
Hardware
| Audio | Yes |
|---|---|
| AV Input | HDMI |
| AV Output | HDMI |
| Cabling | Cat 5e UTP or better |
| Daisy-Chain | No |
| Ports | 1 |
Performance
| Audio Specifications | 7.1 Surround Sound |
|---|---|
| Max Distance | 100 m / 330 ft |
| Maximum Cable Length | 328 ft [100 m] |
| Maximum Digital Resolutions | 4096 x 2160 (4K) @ 30 Hz (35 meters) 1920 x 1080 (1080p) @ 60 Hz (100 meters) |
| Supported Resolutions | 3840x2160 (4K) 2560x1600 1920x1200 1920x1080 (1080p) 1280x720 (720p) |
| Wide Screen Supported | Yes |
Connector(s)
| Connector A | 1 - HDMI (19 pin) |
|---|---|
| Connector A | 1 - RJ-45 |
| Connector B | 1 - HDMI (19 pin) |
| Connector B | 1 - RJ-45 |
Special Notes / Requirements
| Note | If you want to add more displays, you can daisy chain this product with the HDBaseT repeater ST121HDBTRP. |
|---|
Indicators
| LED Indicators | 1 - Status (transmitter) |
|---|---|
| LED Indicators | 1 - Status (receiver) |
Power
| Input Current | 0.5 A |
|---|---|
| Input Voltage | 100 - 240 AC |
| Output Current | 1.5 A |
| Output Voltage | 12 DC |
| Plug Type | M |
| Power Consumption (In Watts) | 18 |
| Power Source | AC Adapter Included |
Environmental
| Humidity | 0% - 80 % RH (non-condensing) |
|---|---|
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -10°C to 60°C (14°F to 140°F) |
Physical Characteristics
| Enclosure Type | Aluminum |
|---|---|
| Product Height | 1 in [2.5 cm] |
| Product Length | 3.1 in [80 mm] |
| Product Width | 2.6 in [67 mm] |
| Weight of Product | 14.9 oz [423 g] |
Packaging Information
| Package Height | 2.8 in [72 mm] |
|---|---|
| Package Length | 11.6 in [29.5 cm] |
| Package Width | 7.7 in [19.6 cm] |
| Shipping (Package) Weight | 2.6 lb [1.2 kg] |
What's in the Box
| Included in Package | 1 - HDMI extender |
|---|---|
| Included in Package | 1 - HDMI receiver |
| Included in Package | 4 - mounting brackets |
| Included in Package | 2 - foot pad set |
| Included in Package | 1 - universal power adapter (NA / EU / UK / AU) |
| Included in Package | 2 - grounding wires |
| Included in Package | 1 - 4ft (1m) Cat5e Cable |
| Included in Package | 2 - screw sets |
| Included in Package | 1 - instruction manual |
| SKU | ST121HDBTPW |
| Barcode # | 65030854177 |
| Brand | STARTECH |
| Shipping Weight | 1.1700kg |
| Shipping Width | 0.200m |
| Shipping Height | 0.080m |
| Shipping Length | 0.300m |
| Shipping Cubic | 0.004800000m3 |
StarTech.com warranty in Australia
This item is the Australian version supplied by DeviceDeal and is covered by the official StarTech.com 2-year manufacturer warranty in Australia.
Please retain your DeviceDeal tax invoice as proof of purchase.
Warranty coverage and claims are subject to StarTech.com warranty terms, eligibility requirements and product assessment.
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