StarTech.com
StarTech.com ST121HDBTDK AV extender AV transmitter & receiver
Extend your HDMI A/V signal seamlessly with the StarTech.com ST121HDBTDK AV Extender Kit, utilizing HDBaseT technology for reliable transmission up to 70 meters (230 feet). Enjoy stunning 4K video resolution up to 130 feet (40 meters), with full compatibility for 1080p signals across the maximum distance. The compact transmitter features a built-in HDMI cable and is conveniently USB-powered for easy setup. This kit supports immersive 7.1 audio channels and uses standard CAT5e/6/7 cabling, reducing installation complexity and cost. It is an ideal solution for professional digital signage and advanced home theater applications.
$405.54
Owner Satisfaction
4.4
/ 5
Category Rank
147
/ 297
#147 in Video Transmitters
Price vs Category Average
-46%
Below average
Maximum Resolution Support
4
/ K
Who it's for
- Extended HDBaseT Range
- Power over Cable (PoC)
- Integrated Control Pass-Through
Who should skip it
- Premium Price Point
- Sensitivity to Cable Quality
- Larger Form Factor
Key Specs
Maximum Resolution Support
4K
Maximum Extension Distance (4K)
40 meters (130 feet)
Maximum Extension Distance (1080p)
70 meters (230 feet)
Audio Support
7.1 channels
Cable Compatibility
CAT5e, CAT6, or CAT7
Transmitter Power Input
USB powered
Warranty
24 months
Device Functionality
AV extender
Features
- Extends HDMI A/V signal up to 70 meters using HDBaseT.
- Supports 4K video resolution up to 40 meters.
- Transmitter is compact and powered conveniently via USB.
- Includes mounting hardware for discreet receiver installation.
- Supports immersive 7.1 channel audio.
- Utilizes standard, cost-effective CAT5e/6/7 cabling.
- Maintains 1080p resolution up to 230 feet.
What customers say
Customers highly value the StarTech.com HDBaseT extender kit for its exceptional reliability and professional build quality. The durable metal chassis supports demanding commercial setups, delivering stable, high-quality video transmission, even at 4K resolutions, without signal issues common in lesser extenders. Setup is consistently straightforward and plug and play. The core appeal is its dependable long-distance performance using standard cabling. While the premium price is noted, users agree the superior stability and longevity justify the investment for critical applications. It is recognized as a high-performing workhorse favored by IT professionals prioritizing consistent operation.
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$406