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Acer K138ST

alaTest has collected and analyzed 6 reviews of Acer K138ST. The average rating for this product is 3.1/5, compared to an average rating of 4.2/5 for other Projectors for all reviews. Reviewers really like the reliability. The size also gets good reviews, but many are negative about the noise and price.

usability, size, reliability

image quality, price, noise

We analyzed user and expert ratings, product age and more factors. Compared to other Projectors the Acer K138ST is awarded an overall alaScore™ of 91/100 = Excellent quality.

Review analysis

(Based on 6 reviews)

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Consumer review ( review summary for Acer K138ST


alaTest has collected and analyzed 1 user review of Acer K138ST from The average user rating for this product is 1.0/5, compared to an average user rating of 4.3/5 for other Projectors on There are some critical opinions about the price and image quality.

image quality, price

0% of the reviews on give this product a positive rating.

This summary is based on the products: Acer K138ST 3D Portable Projector, WXGA, 800Lm, 100.000/1, HDMIAcer K138ST 3D Portable Projector, WXGA, 800Lm, 100.000/1, HDMI

Mar, 2018

Expert review by : Tony Hoffman (

Acer K138ST


The LED-based Acer K138ST has a relatively short throw distance and can project content from a smartphone via its MHL-enabled HDMI connection.

Compact. Lightweight. Can project content from a smartphone. Long lamp life. Short throw distance. Comes in soft carrying case.

Limited connection choices. Rainbow effect in video. Scaling artifacts visible at projector's native resolution.

Conclusion The Acer K138ST is compact and easily portable, and it has a relatively short throw for an LED projector, so you can position it close to the screen, and you can also display content from a smartphone attached to its MHL-enabled HDMI port....

Mar, 2016

Expert review by : Alex Hernandez (

Acer K138ST Projector review: A decent LED home projector


Projectors have multiple use applications from the office to a home theater and the Acer K138ST is capable of living in multiple worlds.

Compact and portable. Nice carrying case included. Easy setup and easy to use.

Speakers are weak, price point may be strong for a 720p projector.

A decent home or office with the basics and not much more.

Jun, 2016

Product Specifications


Colour of product:White
Product Type:Portable projector


Built-in Display:N


Lamps quantity:1
Service life of lamp:20000
Service life of lamp (economic mode):30000

Lens System

Digital Zoom:1.7
Throw ratio:0.8:1


Built-in speaker(s):Y
Number of built-in speakers:2
RMS rated power:6


Ethernet LAN:N

Operational conditions

Operating temperature (T-T):5 - 40

Packaging Content

Batteries included:Y
Cables included:AC
Carrying case:Y
Handheld remote control:Y
Quick start guide:Y
User guide:Y


Mac operating systems supported:Y
Noise Level:33
Noise level (economic mode):29
Vertical scan range:50 - 120
Windows operating systems supported:Y

Ports & interfaces

AC (power) in:Y
DVI port:N
HDMI ports quantity:1
USB 2.0 ports quantity:1
VGA (D-Sub) ports quantity:1


AC input voltage:100 - 240
Power consumption (economy mode):38
Power consumption (typical):80
Power Source:AC


Contrast ratio (typical):100000:1
Horizontal synchronization (max):100
Horizontal synchronization (min):30
Keystone correction, vertical:-20 - 20
Maximum digital resolution:1920 x 1080
Native Aspect Ratio:16:10
Number of Colours:1.073 billion colours
Projection distance:0.4 - 1.7
Projection Technology:DLP
Projector brightness:800
Projector native resolution:WXGA (1280x800)
Screen size compatibility:635 - 2540
Supported aspect ratios:4:3, 16:9, 16:10
Vertical synchronization (max):120
Vertical synchronization (min):50


Card reader integrated:N


Full HD:N

Weight & Dimensions