LG KT-T550 (Discontinued) · Replacements in Qatar

Name: LG KT-T550 55-inch IR Touch Overlay Kit (Discontinued)
Brand: LG
SKU: lg-kt-t550
Availability: Discontinued

Overview

The LG KT-T550 is a discontinued 55-inch infrared touch overlay kit for compatible LG signage displays. It supports up to 10 simultaneous touch points with 1 mm accuracy, uses 2.8T anti-glare protection glass and connects by USB 2.0. It suits schools, government offices and retail sites in Qatar that already run a listed LG 55-inch panel. Request a quote for a current equivalent or compatible replacement.

What the KT-T550 adds to a compatible LG 55-inch display

The LG KT-T550 is a touch overlay kit for the 55-inch class of LG signage displays. It fits in front of a compatible screen and turns the panel into a touch surface using infrared sensing, so the display itself does not need built-in touch hardware. The head measures 1,266 x 739 x 23.5 mm, weighs 9.7 kg and has a bezel width of 27.0 mm. The manufacturer has discontinued this model, so it is most relevant to organisations that already own a listed LG panel, buyers comparing options, and anyone looking for a current replacement.

Touch performance and what it means in use

Touch is registered at a resolution of 1,428 x 803 with an accuracy of 1 mm and a scan time of 9 to 15 ms. The kit handles up to 10 touch points at once, so two or more people can annotate or move objects together, and it detects objects as small as 8 mm in diameter. The protection glass is 2.8T with an anti-glare finish, which reduces reflections in brightly lit rooms.

Connection, power and operating systems

The kit connects over USB 2.0 and the data lists USB as its power supply, with a typical consumption of 1.31 W. Listed operating system support covers Windows 7, Windows 8, Mac OS X 10.7 or later, Android and Linux with kernel 3.9 or later. The manufacturer marks IWB software as not supported, so the kit is planned for touch input into the applications you already use rather than as a whiteboard package.

Where it fits in Qatar

A university lecture room in Education City where a listed 55-inch LG panel is used for interactive teaching, with the overlay connected to the teaching PC by USB.
A government reception area in Msheireb set in portrait orientation for visitor directories and wayfinding, which the kit supports.
A bank branch or retail outlet in Al Sadd or West Bay using touch for service or product catalogues.

Planning the installation

Confirm the exact panel model before ordering. The source data lists compatibility with 55SE3B, 55SM5B, 55SE3KB, 55SM5KB, 55SM3B and 55SL5B. Because the head weighs 9.7 kg and must align with the panel, SmartRooms Qatar offers a free site survey before fitting. The listed operating range is 0°C to 40°C and 10% to 80% humidity. Outdoor temperatures in Qatar can exceed 45°C in summer, so keep the display in an air-conditioned room and confirm the environment with the SmartRooms Qatar team. The data gives a maximum of 60 mm for the overlay dimension, so check clearance at the mounting position.

Because the KT-T550 is discontinued, request a quote for a current equivalent or a compatible replacement. The SmartRooms Qatar team will check panel compatibility and usually send a quotation within one working day. Purchase orders (LPOs) and government tenders are welcome.

Highlights

Infrared touch overlay for 55-inch LG signage displays
Up to 10 simultaneous touch points
1 mm accuracy, 9 to 15 ms scan time
2.8T anti-glare protection glass
USB 2.0 connection, powered over USB, 1.31 W typical
Discontinued by the manufacturer; quote for a current equivalent

Estimated timeline

Quotation within 1 working day · delivery timing depends on stock availability, and we confirm it with your quotation.

Specifications

22 specifications · Source: manufacturer · checked Oct 2026

TOUCH9

Touch type: IR(Infrared Rays) Spread
Available object size for touch: Ø 8mm
Scan Time: 9 ~ 15ms
Accuracy: 1mm
Interface: USB 2.0
Protection Glass Thickness: 2.8T (Anti-Glare)
Operating Systme Support: Windows 7, Windows 8 / Mac OS X (10.7 or later) / Android / Linux (Kernel 3.9 or later)
Multi touch point: Max 10 Point
Touch Resolution: 1,428 x 803

PANEL3

Screen Size: 55"
Compatible Products: 55SE3B, 55SM5B, 55SE3KB, 55SM5KB, 55SM3B, 55SL5B
Orientation: Landscape & Portrait

CONNECTIVITY1

Input: USB

PHYSICAL SPECIFICATION3

Bezel Width: 27.0mm
Overlay Dimension (W x H x D): 1,266 x 739 x 23.5 mm (Max 60 mm)
Weight (Head): 9.7kg

ENVIRONMENT CONDITIONS2

Operation Temperature: 0°C to 40°C
Operation Humidity: 10 % to 80 %

POWER2

Power Supply: USB
Typ.: 1.31W

SOFTWARE COMPATIBILITY1

IWB Software: No

ACCESSORY1

Basic: Manual (Overlay), Install Accessories

Downloads

3 files from the manufacturer

PDF Manuals & guides Ara.pdf 2.9 MB PDF Manuals & guides Eng_EU.pdf 2.9 MB URL Software & firmware · Opens on manufacturer site Software & Drivers (support page)

Questions about KT-T550

What is the LG KT-T550?

The LG KT-T550 is a 55-inch-class infrared touch overlay kit for compatible LG signage displays. It adds touch input to a listed panel without changing the display itself. The kit connects by USB 2.0 and supports up to 10 touch points. The manufacturer has discontinued this model, so SmartRooms Qatar can quote a current equivalent or a compatible replacement for buyers who need touch on a similar panel.

Is the KT-T550 still available from the manufacturer?

No. LG has discontinued the KT-T550, so new units may not be available. If your organisation already owns a listed LG 55-inch panel, the SmartRooms Qatar team can check whether a current touch overlay matches it. Request a quote with your panel model code and we will confirm the closest compatible option and its availability before you commit.

Which LG displays is the KT-T550 compatible with?

The source data lists compatibility with six LG models: 55SE3B, 55SM5B, 55SE3KB, 55SM5KB, 55SM3B and 55SL5B. Check the model code printed on the back or label of your display before ordering. If your panel is not on this list, do not assume the overlay will fit, and ask for a compatibility check when you request a quote.

Can the KT-T550 be used as an interactive whiteboard?

Not as a packaged whiteboard system. The manufacturer data marks IWB software as not supported. The kit provides touch input to the computer connected by USB, so teachers or presenters can use touch with the software they already run, such as presentation, browser or annotation tools. If you need dedicated whiteboard software, plan for it separately.

Which operating systems does the KT-T550 support?

The listed operating system support includes Windows 7, Windows 8, Mac OS X 10.7 or later, Android and Linux with kernel 3.9 or later. The data does not list Windows 10 or Windows 11 for this model, so confirm your computer's operating system and driver requirements with the SmartRooms Qatar team before installation, particularly for an office or school that has upgraded its PCs.

How many touch points and how accurate is touch?

The KT-T550 supports a maximum of 10 touch points and registers touch with an accuracy of 1 mm. The touch resolution is 1,428 x 803, scan time is 9 to 15 ms, and it detects objects as small as 8 mm in diameter. These figures suit classroom group work and collaborative meeting sessions where several people interact with the screen at the same time.

Does the KT-T550 need a separate power adapter?

The data lists USB as the power supply, with a typical consumption of 1.31 W. The overlay is therefore powered through its USB connection to the computer, so you do not need a separate mains adapter for the kit itself. The display and computer still require their own power in the normal way. Your installer will confirm the cable routing during the site survey.

Can it be mounted in portrait orientation for a reception screen?

Yes. The manufacturer lists both landscape and portrait orientation. A government reception or hospital lobby in Doha might use a portrait panel for visitor directories, queue information or wayfinding with touch. Confirm the orientation you need when requesting a quote, because the overlay must match the panel's installed position.

What size and weight should I plan for when fitting it?

The overlay head measures 1,266 x 739 x 23.5 mm and weighs 9.7 kg, with a bezel width of 27.0 mm. The data gives a maximum of 60 mm for the overlay dimension. Plan the mounting area, cable route and clearance behind the panel before the day of installation. SmartRooms Qatar offers a free site survey to check the wall or stand and confirm the fit.

Will the KT-T550 cope with Qatar's heat and dust?

The listed operating range is 0°C to 40°C with 10% to 80% humidity. Summer temperatures in Qatar can exceed 45°C, so the display and overlay should be kept in an air-conditioned indoor space, away from direct sunlight and dust. If the installation area is near a window, a loading bay or an open lobby, confirm the environment with the SmartRooms Qatar team before you order.

Could a school in Al Wakrah fit out classrooms with this kit?

A private school in Al Wakrah that already has listed LG 55-inch panels could add touch to several classrooms with the KT-T550 or a current equivalent. Each room needs a computer connected by USB and a clear wall or stand. Schools ordering several units can raise one purchase order, and SmartRooms Qatar will schedule a site survey for each classroom to check the fit.

Can a ministry or authority in Doha buy this kit through a tender or LPO?

Yes. SmartRooms Qatar accepts purchase orders (LPOs) and government tenders, including Monaqasat, and payment by bank transfer, cheque or purchase order. Because the KT-T550 is discontinued, the quotation should name your panel model and the compatible replacement offered. Request a quote early so the specification in your tender matches a product that can still be supplied.

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