Visit our Business Solutions website >>

Acer K138ST

Acer K138ST
alaScore 91

6 reviews

Feb, 2018

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.

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)

Expert Reviews  

User Reviews  


Below is a list of reviews for this or similar products. If you think this grouping is wrong please click here to flag.
Read more on our FAQ’s page.
Showing 1 - 3 of 3 Show Reviews: in English | in other languages (3)

Consumer review by: ( 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

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

Feb, 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


Ceiling mountable: Yes
Ceiling mounting supported:Y
Color of product:White
Form Factor:Desktop / Portable
Product type:Desktop projector / Portable projector


Built-in display:N / No

Energy Management

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


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

Lens System

Digital Zoom:1.7
Optical Zoom:1
Throw ratio:0.8:1


Built-in speaker(s):Y
Built-in speakers: Yes
Number of built-in speakers:2
RMS rated power:3 / 6


Ethernet LAN:N
Ethernet LAN connection: No
Wi-Fi:N / No

Operational Conditions

Operating relative humidity (H-H):0 - 80
Operating relative humidity range:0 - 80
Operating temperature (T-T):5 - 40
Operating temperature range (T-T):5 - 40

Other Features

Audio Input:Y
Audio Output:Y

Packaging Content

AC adapter bundled: Yes
AC adapter included:Y
Batteries included:Y / Yes
Cables included:AC
Carrying case:Y / Yes
Handheld remote control:Y / Yes
Manual: Yes
Quick start guide:Y / Yes
Remote Control Type:IR
User guide:Y / Yes


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

Ports & interfaces

AC (power) in:Y / Yes
DC-in jack: Yes
DVI port:N / No
HDMI connector type:Full-size
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 (PowerSave):38
Power consumption (typical):80
Power Source:AC


Contrast ratio (dynamic):100000:1
Contrast ratio (typical):100000:1
Horizontal synchronization (max):0.1 / 100
Horizontal synchronization (min):0.03 / 30
Keystone correction, vertical:-20 - 20 / -40 - 40
Maximum digital resolution:1920 x 1080
Native Aspect Ratio:16:10
Number of colors:1.073 billion colors / 1070
Objective projection distance:15.7 - 66.9
Projection distance:15.7 - 66.9
Projection technology:DLP
Projector brightness:800
Projector native resolution:WXGA (1280x800)
Screen size compatibility:25 - 100
Supported aspect ratios:4:3, 16:10, 16:9 / 4:3, 16:9 / 4:3, 16:9, 16:10
Vertical synchronization (max):0.12 / 120
Vertical synchronization (min):0.05 / 50
Zoom capability: Yes


Card reader integrated:N / No


3D compatibility: Yes
3D-ready:Y / Yes
Full HD:N / No
HD-Ready: Yes
Supported graphics resolutions:1920 x 1080 (HD 1080)

Weight & Dimensions

Weight:26.4 / 26.5