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BenQ MX842UST WXGA 3000 ANSI Lumens Ultra Short Throw - Refurbished

SKU-MX842UST-002 Refurbished

Model Highlights

Ultra-Sharp Images at Short Distances

Designed for disruption-free learning in small-sized classrooms, the MX842UST offers a big screen from short distances with a 0.47 ultra-short throw ratio. Together with 13,000:1 ultra-sharp contrast ratio and 3000 ANSI lumen brightness, this projector offers engaging image quality for your classroom!

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  • Overview
  • Specs
  • Warranty
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  • Accessories
  • Reviews

Power Saving, Eco Friendly

Saving More on Power Consumption with BenQ's SmartEco™ Technology

Offering lower Total Cost of Ownership (TCO) and optimized projection through dynamic power saving, uncompromised brightness, exquisite picture quality and optimized lamp life – SmartEco technology has perfected what a DLP projector can do. With this innovation, schools and companies are able to save up to 70% of lamp power consumption and lower maintenance costs through dynamic power saving features while bringing an ultra-vivid viewing experience to every presentation.


SmartEco Mode: Power Smarter

By detecting the input content to determine the amount of brightness required for optimum color and contrast performance, the SmartEco Mode is able to reduce lamp power while delivering the finest image quality. No compromise!

*SmartEco Mode, the dynamic power saving mode, can save at least 70% power based on the projection content level.

Eco Blank Mode

The Eco Blank Mode, which lowers power consumption down to 30%, can be used to blank the projection screen when the projector is not in use, eliminating distractions in class and redirecting students' focus back on the teacher.




No Source Detected Mode

The No Source Detected Mode, which can be set to enter the Eco Blank Mode after three minutes of inactivity or to the Auto Power Off Mode after no display source has been detected for over 30 minutes, prevents the projector from running at full lighting power. It's just another way of doing your part in saving the planet.




Good Things Come in Short Distances

Zero Space Constraints

You don't need a big room or a lot of free ceiling space to create a big picture when you've got an ultra-short throw projector! Teachers can think outside the box to turn every corner into the perfect place for educational use.


Zero Shadow Disruptions

An ultra-short throw projector can be placed close to the screen in front of the class and well out of students' way, greatly decreasing shadow disruptions. Teachers can enjoy teaching without worrying about the class being interrupted.


Zero Eye-Blinding Lights

An ultra-short throw projector keeps the projector light from shining directly into everyone's eyes. The intensity of the projector beam may be potentially harmful, so short throw technology keeps light out of the way.


3D Blu-ray Full HD 3D Supported

BenQ's MX842UST is built with the latest DLP® technology to support 3D functionality, allowing schools to bring an immersive learning experience to their students with 3D glasses and 3D content. (glasses sold separately)


Hassle-free Projector Maintenance

Projector Management through LAN Control

LAN Control is designed to help IT managers perform day-to-day projector maintenance and repair tasks efficiently and effectively – offering them full access and control over every projector directly from their workstations. The MX842UST offers seamless support for the Crestron LAN Control system.

BenQ DLP® Colorific Projectors︱Long-lasting Image Perfection with DLP Technology

Timeless Image Quality:

BenQ's DLP Colorific Projectors are built with enduring enjoyment in mind, ensuring razor-sharp clarity, ultra-readability and true-to-life color for years to come. We use leading-edge DLP technology to reflect pure light from millions of micro mirrors on a DMD chip through our advanced color wheels. Since the mirrors are colorless and protected within a nearly-sealed engine, BenQ DLP Projectors have no aging problems and are virtually immune to image decay, consistently delivering picture excellence time and time again. In fact, after 2,000 hours of intense usage, inserting a new bulb produces image quality comparable to a brand-new projector.





DLP technology also affords a filter-free engine design ensuring long-lasting image quality and reduced total cost of ownership. BenQ's SmartEco™ technology further boosts contrast performance and image quality endurance while saving up to 70% on lamp power consumption.

Razor-Sharp Clarity with Ultra-readability:

Enabling a 96% fill factor, DLP Technology supplies pixel circuitry behind the pixel, eliminating the thick dark bezels around individual pixels, which diminish color and detail. A higher fill factor and less black border translate to noticeably purer, more intense color and smoother image quality.

BenQ DLP Projectors also feature high contrast ratios for flawless rendering of small text, fine lines, and dark scene details. Blacks are deeper and overall image quality is more focused and clean. Your presentations will be easily readable and highly effective, even from the back row of a well-lit venue.


Vibrant, True-to-life Colors:

Even in lit venues, BenQ DLP Colorific Projectors achieve the optimal balance of brightness and color accuracy, with BrilliantColor™ technology additionally boosting true-to-life colors that captivate. BrilliantColor enables up to six-color processing by incorporating the secondary colors Yellow, Cyan, and Magenta along with primary Red, Blue, and Green. From intense hues to elusive mid-tones like aqua blues and light yellows, your presentations are rendered in pure, living splendor.



ecoFACTS Label

ecoFACTS can tell you how eco-friendly BenQ products are!

Development of eco-friendly products, BenQ doesn't just want to comply with green regulations passively, but also to actively develop eco-friendly products!

ecoFACTS declares BenQ's greatest efforts on the replacement of hazardous substances, material selection, packaging design, energy-saving design and other aspects of the products.


Arsenic-free optical glass

BFR/PVC-free casing plastics

PVC-free plastic packaging


Model MX842UST
Projection System DLP
Native Resolution XGA(1024 X 768)
Brightness* (ANSI Lumens) 3000AL
Contrast Ratio 13000:1
Display Color 1.07 Billion Colors
Lens F=2.53,f=5.38
Aspect Ratio Native 4:3 (5 aspect ratio selectable)
Throw Ratio 0.47
Image Size (Diagonal) Optimization Optimize 60"-120" / Max up to 300"
Zoom Ratio Fix
Lamp Type 240W
Lamp Mode (Normal/Economic/SmartEco/LampSave/LumenCare)* 3500/5000/7000 hours
Keystone Adjustment 1D, Vertical ± 15 degrees
Projection Offset 153% ±5%
Resolution Support VGA(640 x 480) to UXGA(1600 x 1200)
Horizontal Frequency 15-102KHz
Vertical Scan Rate 23-120Hz
Interface Computer in (D-sub 15pin) x 2(Shared with component) 
Monitor out (D-sub 15pin) x 1
Composite Video in (RCA) x 1
S-Video in (Mini DIN 4pin) x 1
HDMI x 1
Audio in (Mini Jack) x 2
Audio out (Mini Jack) x 1
Audio L/R x 1
Speaker 10W x 2
USB (Type mini B) x 1 (FW download)
RJ45 x 1 (LAN control)
RS232 (DB-9pin) x 1
IR Receiver x 2
Dimensions (W x H x D mm) 339 x 236.9 x 322.8mm
HDTV Compatibility 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Video Compatibility NTSC, PAL, SECAM
Weight 5.4kg (wall mount base plate excluded)
Audible Noise (Normal/Economic Mode) 36/30 dBA (Normal/Economic mode)
Power Supply AC100 to 240 V, 50 to 60 Hz
Power Consumption typical 330W, stanby power
On-Screen Display Languages Arabic/Bulgarian/ Croatian/ Czech/ Danish/ Dutch/ English/ Finnish/ French/ German/ Greek/ Hindi/ Hungarian/ Italian/ Indonesian/ Japanese/ Korean/ Norwegian/ Polish/ Portuguese/ Romanian/ Russian/ Simplified Chinese/Spanish/ Swedish/ Turkish/ Thai/ Traditional Chinese (28 Languages)
Picture Modes Dynamic/Presentation/sRGB/Cinema/(3D)/User 1/User 2
Accessories (Standard) Remote Control w/ Battery : Yes
Power Cord (by region) : Yes
User Manual CD : Yes
Quick Start Guide : Yes
Warranty Card (by region) : Yes
VGA(D-sub 15pin) Cable : Yes
Wall mount kit (installation guide) : Yes
Accessories (Optional) Spare Lamp Kit : Yes
Wall Mount : Yes
3D Glasses : Yes
Document Camera : S30

*Lamp life results will vary depending on environmental conditions and usage. Actual product's features and specifications are subject to change without notice.


One year limited warranty