Can I cascade several of these using a y-splitter?

I believe you can, as long as you do not exceed the signal length (you will lose some with the split. When using 2 you only need to power one but in your case I would power the two after the split at least, but need to power all three.

What resolutions are supported at 150 ft. and 250 ft. with this VGA extender?

At 150 ft. (50 m), it supports resolutions of 1920x1200 or 1600x1200. At 250 ft. (80 m), it supports resolutions of 1280x1024 or 1024x768.

What is the maximum distance this VGA extender can extend a signal?

The maximum distance this VGA extender can extend a signal is up to 250 ft. (80 m).

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StarTech.com ST121UTPEP VGA to Cat 5 Monitor Extender Kit (250ft/80m) - VGA over Cat5 Video Extender - 1 Local and 1 Remote

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Extend a VGA signal to a remote display using Cat5 cabling
Works with VGA computers
Works with VGA TVs monitors & projectors
Maximum extension distance up to 250 ft. (80 m)
Supports 1920 x 1200 or 1600 x 1200 resolutions at 150 ft. (50m)
VGA extender / VGA to CAT5 / CAT5 VGA extender / VGA over CAT5 extender / Remote monitor extender
Tidy professional installation with mounting brackets included
Extend a VGA video signal to a remote location for your digital signage application

Overview

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This point to point VGA over Cat 5 video extender allows you to connect to one remote display projector from a single PC or media player. Supports distances of up to 80m (250ft) between the VGA source and intended display.

Best Seller Ranking	#33 in Pro A/V Extender & Repeater

Model
Brand	StarTech.com
Model	ST121UTPEP

Details
Extender & Repeater Type	Non Wall Plate Extender

Performance
Distance	Max Distance: 80 m / 260 ft
Resolution Support	1920x1200 @ 50m(164ft) 1280x1024 @ 80m(260ft)

Compatibility
System Requirements	Resolution may vary at distances depending on cable quality. Cat 5e UTP cables are recommended.

Power
Power Supply	Power Adapter Included: Yes Output Voltage: 12 DC Output Current: 0.6A Center Tip Polarity: Positive

Specification
Specification	Cabling: Cat 5 UTP Audio: No Daisy-Chain: No Color: Black Enclosure Type: Aluminum Local Unit Connectors 1 - RJ-45 Female 1 - VGA (15 pin; High Density D-Sub) Female Remote Unit Connectors 1 - RJ-45 Female 1 - VGA (15 pin; High Density D-Sub) Female

Feature
Feature	Extends video signal by up to 250 ft. (80m) Supports 1920x1200 or 1600x1200 resolutions at 150 ft. (50m) Supports 1280x1024 or 1024x768 resolutions at 250 ft. (80m) Mounting bracket included Single power adapter can be connected at local or remote end of the extension Uses standard Cat 5 or better cabling Kit consists of 1 Base unit and 1 Remote unit Pure hardware design - no software or drivers required

Dimensions & Weight
Dimensions	5.4"W x 3.9"L x 1"H
Weight	36g

Package Contents
Package Content	1 - VGA over Cat5 Transmitter 1 - VGA over Cat5 Receiver 1 - Installation Bracket (w/ screws) 1 - VGA Cable 1 - Universal Power Adapter (NA/UK/EU/AUS) 1 - Instruction Manual

Additional Information
First Listed on Newegg	August 02, 2024

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StarTech.com ST121UTPEP VGA to Cat 5 Monitor Extender Kit (250ft/80m) - VGA over Cat5 Video Extender - 1 Local and 1 Remote

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Item#: 9SIA6ZPK9X7917

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StarTech.com ST121UTPEP VGA to Cat 5 Monitor Extender Kit (250ft/80m) - VGA over Cat5 Video Extender - 1 Local and 1 Remote

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Customer Reviews of the STARTECH ST121UTPEP

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