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Pair of small HDMI extender units with CAT5 ports and power adapter

STARTECH

STARTECH ST121HDBTE HDMI over CAT5 HDBaseT Extender 70m 4K 30Hz

SKU CH-DKHC-M93WZ MPN ST121HDBTE

Extends HDMI up to 70 m over a single CAT5e cable with power over cable and 4K at 30 Hz support

  • Supported distance70m / 230 ft (Max)
  • Supported resolutions4096 × 2160 (4K) @ 30 Hz
  • Sound7.1 Surround Sound
  • Indicator light1 x Power Indicator
  • Power supplyCenter Tip Polarity: Positive Input Current: 0.5A Input Volt
  • Spec summaryHardware Audio: Yes Cabling: Cat 5e UTP or better Daisy-Chai

Model 230 ft. Distance

  • Extends 4K 30 Hz video up to 70 m over one CAT5e cable
  • Powers transmitter and receiver from a single adapter through the cable
  • Delivers 7.1 surround sound alongside high-definition video
  • Includes mounting hardware and universal power adapter for quick setup
  • Compact 0.98 × 2.64 × 3.15 in units fit tight spaces

HDMI over CAT5e/6 Extender

The ST121HDBTE extends an HDMI signal up to 70 metres over a single Cat 5e or Cat 6 cable. It is built for installers and AV professionals who need to place a display far from the source without running long HDMI leads. Both transmitter and receiver units draw power from one included adapter through the same cable.

Distance and Resolution Limits

The extender reaches its full 70 metre range at 1080p resolution. At 4K (4096 x 2160) the maximum supported refresh rate is 30 Hz, so motion-intensive content at higher frame rates is not supported. The HDBaseT link carries 7.1 surround audio alongside video.

Capacity and Headroom

The kit includes transmitter, receiver, mounting brackets, a universal power adapter and a short Cat5e patch lead. It handles typical digital-signage, conference-room and classroom runs where a single cable simplifies installation. It does not support daisy-chaining multiple receivers, so each display needs its own point-to-point link.

How it compares

Measured against everything we stock in A/V Extenders & USB Hubs, at today’s prices. Recalculated every night.

Price $178.99
Pricier than about 61% of the 239 comparable items (median $132.99).

Specifications

Product
Brand nameStarTech.com
Model nameST121HDBTE
Performance
Supported distance70m / 230 ft (Max)
Display
Supported resolutions4096 × 2160 (4K) @ 30 Hz
Audio & video
Sound7.1 Surround Sound
Power
Power supplyCenter Tip Polarity: Positive
Input Current: 0.5A
Input Voltage: 100 to 240 AC
Output Current: 1.5A
Output Voltage: 12 DC
Plug Type: M
Power Source: AC Adapter Included
Size & build
Product dimensions0.98 in × 2.64 in × 3.15 in
Product weight0.68 lb (0.31 kg)
Shipping weight1.09 kg
Package size236 × 147 × 64 mm
In the box
Included items1 x HDMI over CAT5e/6 transmitter unit
1 x HDMI over CAT5e/6 receiver unit
1 x mounting bracket kit
1 x universal power adapter (NA/EU/UK/AU)
1 x Cat5e cable
1 x instruction manual
More details
Indicator light1 x Power Indicator

Other versions of this model

1 more in the same range

Questions about this item

Should I choose the 70m version or a shorter model for my install?

This unit reaches 70m over a single CAT5e cable and includes power over cable so only one adapter is needed; pick it when the run exceeds shorter extender limits.

What does 4K 30Hz actually deliver on my display?

The extender passes 4096 x 2160 at 30 Hz with 7.1 surround sound, so UHD video and multi-channel audio arrive intact at the far end.

Does the HDBaseT link cap bandwidth or distance in practice?

HDBaseT carries the signal 70m over Cat 5e UTP or better with no daisy-chaining, and the single CAT5 cable also powers both transmitter and receiver units.

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