Type | HDMI HDBaseT Extender Kit |
Form Factor | External module (transmitter and receiver pair) |
Power Requirements | USB Powered (5V via USB or external power adapter) |
Weight | 160 g (each unit approx.) |
StarTech 4K HDMI HDBaseT Extender Kit, USB Powered (ST121HDBTDK)





Key Benefits

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- Enables long-distance 4K HDMI transmission over standard Ethernet cabling, reducing infrastructure costs
- USB-powered setup reduces need for additional power sources, offering flexible placement
- Backed by TAA compliance and 2-year warranty, ensuring suitability for secure and government installations
Product Overview
USB powered HDMI HDBaseT extender kit transmitter - 4K HDMI extender - HDMI over CAT5 extender transmits HDMI over Ethernet extender cabling up to 70 m - HDMI Over CAT6 extender installs easily and discreetly - HDMI over CAT7 extender with 7.1 audioSpecifications
Product Overview
Wireless Features
Compliance & Origin
Country of Origin | Taiwan |
TAA Compliant | Yes |
RoHS Compliant | Yes |
CE Certified | Yes |
FCC Compliant | Yes |
WEEE Compliant | Yes |
Advanced Security Features
Interfaces
HDMI Interface | HDMI 1.4 |
Ethernet Interface | RJ-45 (HDBaseT over Cat5e/6/7) |
Audio Support | 7.1 Channel Surround Sound |
Video Transmission Interface | HDBaseT |
HDMI Ports | 1 x HDMI input (Transmitter), 1 x HDMI output (Receiver) |
USB Power Input | 1 x USB Micro-B |
Maximum Supported Resolution | 4096 x 2160 (4K) @ 30 Hz |
Maximum Transmission Distance | 70 m (230 ft) over Cat6/7; 40 m (130 ft) over Cat5e |
Supported HDMI Features | 3D, Deep Color, HDCP 1.4 |
Bandwidth | 10.2 Gbps |
Physical & Environmental
Width | 2.7 in (68 mm) |
Depth | 3.1 in (80 mm) |
Height | 1 in (25 mm) |
Enclosure Type | Steel |
Enclosure Color | Black |
Operating Temperature | 0°C to 50°C (32°F to 122°F) |
Storage Temperature | -10°C to 70°C (14°F to 158°F) |
Humidity (Operating) | 10% to 90% RH (non-condensing) |
Humidity (Storage) | 10% to 90% RH (non-condensing) |
Mounting Options | Wall-mountable with included hardware |