StarTech ST122PRO 2-Port High-Resolution VGA Video Splitter

Overview

The StarTech ST122PRO is a 2-port VGA video splitter built to distribute a single high-resolution VGA source to two displays without signal degradation. Rated for 2048x1536 resolution at 80Hz across a 350 MHz video bandwidth, the ST122PRO holds sharp, artifact-free video over cable runs up to 210 ft (65 m) — a common requirement in control rooms, monitoring walls, and multi-display security operations centers where a single VGA feed (camera matrix output, DVR analog monitor, or legacy KVM console) needs to reach two separate screens without running a second cable back to the source. This is a signal distribution amplifier, not a switch — both outputs display the same source simultaneously.

Key Features

• 350 MHz Video Bandwidth: High enough headroom to carry 2048x1536 @ 80Hz cleanly, so text and fine detail on security monitoring walls stay legible instead of smearing at high refresh rates.
• 2-Port Output: Drives two independent VGA displays from one source — useful for a primary operator monitor plus a secondary wall display or supervisor station, without a second run back to the source device.
• 210 ft (65 m) Maximum Cable Length: Extends usable VGA distance well past the ~50 ft ceiling of unamplified VGA runs, letting you place displays in a separate room or across a large operations floor.
• DDC Compatible: Passes Display Data Channel information so connected monitors can auto-negotiate resolution and timing with the source, reducing manual display configuration at each endpoint.
• External 5V/1A Power Adapter (100-240V AC Input): The universal 100-240 AC input auto-adjusts to local mains voltage, so the same unit deploys in US or international facilities without a separate adapter. Power draw is a modest 5 Watts, negligible on any circuit.
• Compact Footprint: At 7.1 x 3.1 x 0.8 in (18.0 x 8.0 x 2.1 cm) and 12.9 oz (366 g), the ST122PRO tucks behind a monitor, inside a rack shelf, or in a wiring closet without consuming meaningful equipment space.
• 0-40°C Operating Range: Suited to standard indoor equipment rooms and control environments; this is not a hardened enclosure for outdoor or unconditioned spaces.
• 0-80% RH Non-Condensing: Tolerates typical indoor humidity swings without a dehumidified server room, simplifying placement in general office or facilities space.
• FCC Part 15 Class A and CE Mark: Verified for commercial/industrial electromagnetic compliance, which matters when the splitter sits in a rack alongside other networking and security gear.

Integration & Compatibility

Because the ST122PRO is DDC compatible and built around standard VGA connectors, it drops into existing analog video infrastructure — legacy DVR monitor outputs, VGA-based KVM extensions, or matrix switcher outputs — without protocol conversion. It pairs naturally with network video recorders and legacy analog monitoring setups where a single VGA output still feeds an operator station, and it's a practical companion to StarTech connectivity products already in a rack. For teams standardizing a monitoring wall or planning cable runs across a facility, review a structured cabling and power planning guide before finalizing distances, since the 210 ft ceiling is bandwidth-dependent — longer runs or higher resolutions reduce reliable distance. If the deployment is shifting toward networked video, compare against IP camera and PoE network switch infrastructure, which eliminates analog distance limits entirely.

What's in the Box

• 1x StarTech ST122PRO VGA Video Splitter
• 1x Power adapter (100-240V AC input, 5V DC / 1A output)

Frequently Asked Questions

Q: How far can I run cable from the ST122PRO to each monitor?

A: Up to 210 ft (65 m) maximum, though actual usable distance depends on the resolution in use — higher resolutions consume more of the 350 MHz bandwidth and reduce reliable maximum distance.

Q: What's the highest resolution the ST122PRO supports?

A: 2048x1536 at 80Hz, backed by 350 MHz of video bandwidth.

Q: Does the ST122PRO need external power?

A: Yes. It ships with a 100-240V AC power adapter that outputs 5V DC at 1A, drawing 5 Watts of power.

Q: What's the warranty on the ST122PRO?

A: 2 years.

Q: Will the ST122PRO auto-configure resolution on connected monitors?

A: It's DDC compatible, so displays can exchange configuration data with the source to help negotiate proper resolution and timing automatically.

Q: Can I install the ST122PRO outdoors or in an unconditioned space?

A: No. It's rated for 0-40°C operation and 0-80% RH non-condensing — standard indoor equipment room conditions, not an outdoor or hardened enclosure rating.

Marty Allison

The spec that matters most on the ST122PRO is the 350 MHz video bandwidth — that's what lets it push 2048x1536 at 80Hz to two displays instead of choking down to a lower refresh rate like cheaper splitters do. I spec this one when a client still has analog VGA monitor walls tied to a legacy DVR or matrix switch and needs a second display fed without a re-run.

Technical Highlights:

• 350 MHz Bandwidth / 2048x1536 @ 80Hz: Enough headroom that high-resolution operator consoles don't lose sharpness across both outputs simultaneously.
• 210 ft (65 m) Max Cable Length: Roughly 4x the distance of a typical unamplified VGA run, so the second monitor doesn't have to sit next to the source.
• 5W Power Draw: The included 100-240V adapter outputs 5V/1A — trivial load, and the universal input means it works the same in a US rack or an overseas facility.

Deployment Considerations:

• Both outputs mirror the same source — there's no switching function here, so if the deployment actually needs to select between multiple sources, this isn't that device.
• The 210 ft distance figure is a maximum at lower resolutions; running the full 2048x1536 @ 80Hz over a long cable run will eat into that ceiling, so plan cable length conservatively on high-res installs.

I'd put the ST122PRO into a control room retrofit where an existing analog matrix switcher feeds one VGA monitor today and the customer wants to add a second confidence monitor at the supervisor desk — 210 ft of headroom covers most single-floor runs without touching the source wiring.