-4-   © 2021 unitech Electronics Co., Ltd. All rights reserved. 
unitech is a registered trademark of unitech Electronics Co., Ltd.
 
MS838 User’s Manual 
Functionality
Symbologies
1D:   
Code 128, EAN-13, EAN-8, Code 39, Code 32, UPC-A, 
UPC-E, Codabar, Interleaved 2 of 5, Code 93, GS1-128, 
GS1 Databar, GS1 Databar Limited, GS1 Databar 
Expanded, Matrix 2 of 5, 
Code 11, Industrial 2 of 5, Matrix 2 of 5 
 
2D:   
PDF417, Micro PDF417, QR Code, Micro QR, Data Matrix, 
Aztec Code 
Operation Mode  Trigger mode, Presentation mode, 
Data Formatting  Prefix, Suffix, Code ID, Reformatting Date 
Electrical 
Operation Voltage  DC 3.6V-5.5V 
Current Consumption  Operation mode: <142mA, Standby mode: <42mA 
Indicator  Buzzer, LED   
Environmental 
ESD Protection  Functional after 8K Contact and 12K Air 
Mechanical Shock  1.5M onto concrete 
Operating Temperature  -10°C to 50°C 
Storage Temperature  -20°C to 60°C 
Relative Humidity  5%-95% non-condensing 
IP Rating  IP42 
RegulatoryApprovals 
CE, FCC, BSMI, VCCII