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Pair of compact black metal boxes with HDMI and dual RJ-45 ports, mounting brackets and power adapter

STARTECH

STARTECH ST121SHD50 HDMI over Cat5/6 Extender 165 ft 1080p

SKU CH-7ZG8-H5K0J MPN ST121SHD50

Extends 1080p HDMI video and audio up to 165 ft over dual Cat5e or Cat6 cable with power over cable to the receiver

  • DistanceMaximum Distances - (1080i only) CAT5E (stranded) - 40m (130
  • Resolution SupportMaximum Digital Resolutions: 1080p / 1920x1080 Supported Res
  • HDMILocal Unit Connectors: 1 x HDMI (19-pin) Female Remote Unit
  • Network InterfaceLocal Unit Connectors: 2 x RJ-45 Female Remote Unit Connecto
  • LED IndicatorLED Indicators: 1 x Power
  • Power Consumption18W
  • Extends 1080p HDMI signals up to 165 ft over Cat5e or Cat6 cable
  • Single power adapter supplies both transmitter and receiver through the Ethernet link
  • Works immediately with no drivers or software installation required
  • Compact units mount in a rack or on a desk using included brackets
  • Dual RJ-45 ports on each unit provide a dedicated extension path

StarTech HDMI Extender 165 ft

The StarTech ST121SHD50 extends HDMI video and audio up to 165 ft (50 m) over dual Cat5e or Cat6 UTP cabling. It supports 1080p resolution at 1920x1080 and 1080i formats. Power over Cable allows a single included 12 V DC adapter to power both the local transmitter and remote receiver units. No software or drivers are required for operation.

Check cabling type and distance needed

Verify the Ethernet cable category and construction in your installation. Solid Cat5e or Cat6 supports the full 50 m (165 ft) at 1080i, while stranded Cat5e is limited to 40 m (130 ft). For 1080p, Cat6 solid or stranded reaches 40 m. Ensure two separate cable runs are available between the source and display locations for the dual RJ-45 connections.

Thermals noise and power draw

The extender operates from 0 °C to 40 °C in 0 % to 80 % humidity with a total power consumption of 18 W supplied by the included AC adapter (100–240 V AC input, 12 V DC 1.5 A output). The compact 0.80" x 3.10" x 2.00" metal enclosures are passively cooled with no moving parts, so they generate no audible fan noise. Rack-mount brackets are included for secure installation.

Highlights

  • Extends 1080p HDMI signals up to 165 ft over Cat5e or Cat6 cable
  • Single power adapter supplies both transmitter and receiver through the Ethernet link
  • Works immediately with no drivers or software installation required
  • Compact units mount in a rack or on a desk using included brackets
  • Dual RJ-45 ports on each unit provide a dedicated extension path

Specifications

BrandStarTech.com
ModelST121SHD50
DistanceMaximum Distances - (1080i only)
CAT5E (stranded) - 40m (130 ft.)
CAT5E (solid) - 50m (165 ft.)
CAT6 (stranded or solid) - 50m (165 ft.)
Max Distance: 50m / 165 ft.
Resolution SupportMaximum Digital Resolutions: 1080p / 1920x1080
Supported Resolutions:
1080i
- Cat6 (stranded or solid) - up to 50m
- Cat5e (solid) - up to 50m
- Cat5e (stranded) - up to 40m
1080p
- Cat6 (solid or stranded) - up to 40m
- Cat5 (solid) - up to 20m
- Cat5 (stranded) - up to 16m
See product manual for further details
HDMILocal Unit Connectors:
1 x HDMI (19-pin) Female
Remote Unit Connectors:
1 x HDMI (19-pin) Female
Network InterfaceLocal Unit Connectors:
2 x RJ-45 Female
Remote Unit Connectors:
2 x RJ-45 Female
LED IndicatorLED Indicators: 1 x Power
Power Consumption18W
Power SupplyCenter Tip Polarity: Positive
Input Current: 0.5A
Input Voltage: 100 ~ 240 AC
Output Current: 1.5A
Output Voltage: 12 DC
Plug Type: M
Power Source: AC Adapter Included
SpecificationHardware
Audio: Yes
Cabling: Cat 5 UTP or better
Daisy-Chain: No
Ports: 1
Rack-Mountable: Yes
Performance
Wide Screen Supported: Yes
Environmental
Humidity: 0% - 80%
Operating Temperature: 0 to 40 celsius degree
Storage Temperature: -10 to 60 celsius degree
FeaturePower Over Cable allows a single power source to operate the Transmitter and Receiver
Supports Cat5e (50m) or Cat6 (40m) Ethernet cabling
No software/drivers required
Supports HD resolutions up to 1080p (1920x1080)
Includes transmitter (local) and receiver (remote) units
Dimensions0.80" x 3.10" x 2.00"
Weight5.50 oz.
Package Content1 x HDMI over CAT5e/6 UTP transmitter
1 x HDMI over CAT5e/6 UTP receiver
1 x universal power adapter (NA / EU / UK / AU)
2 x mounting brackets
2 x foot pad set
1 x instruction manual
Shipping weight1.36 kg
Package size231 × 155 × 66 mm

Questions about this item

What cables and accessories are included, and is any cabling sold separately?

The box contains a transmitter, a receiver, a universal power adapter with NA/EU/UK/AU plugs, two mounting brackets, two foot-pad sets and an instruction manual. Cat5e or Cat6 UTP cable is not included and must be purchased separately.

Which cable type gives the longest 1080p run — Cat5e solid, Cat5e stranded or Cat6?

Both Cat5e solid and Cat6 (solid or stranded) support 1080p up to 40 m; Cat5e stranded is limited to 40 m at 1080i and does not reach the full 50 m distance at 1080p.

How far can I push a 1080p signal over solid Cat6 before the picture degrades?

With solid Cat6 the extender delivers 1080p at 1920 x 1080 up to 40 m (130 ft); the 50 m (165 ft) maximum applies only to 1080i signals.

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