SETUP AND INSTALLATION
The following steps will walk you through the installation process. 
MS840B WITH CRADLE Quick Start Guide
The Unitech MS840B Wireless Scanner
Installation Instructions & Popular Conguration Settings
Connect Cables & Charge
Step 2:
Plug the power supply cable into the MS840B cradle and into an electrical 
outlet. Plug the interface cable into the MS840B cradle. Depending 
on which type you have chosen, you must also connect it to the USB, 
RS232, or PS/2 port on your computer. Charge for at least 5 hours. 
Open a word processing program such as Microsoft Word or 
Notepad on your host. Now scan the following barcode:
Test & Finish
If the word “Unitech” appears on the screen you have succesfully 
installed your scanner. Congratulations!
Scan the barcode label that appears under the cradle. The scanner 
will beep one time to indicate the pairing process has been succesful. 
Your device is now ready to use. 
Scan cradle barcode
Step 4:
Scan here to switch back to Trigger Mode. In Trigger Mode, the 
MS840B will scan only when the scanner button is pressed. 
Trigger Mode
Trigger Mode
You may wish to set your scanner to Tab Mode. In this mode, data will 
tab over to the next column as you scan instead of jumping to the next 
line. Scan the top barcode then the bottom barcode to switch to Tab 
Mode from the default Enter Mode.
Tab Mode
Tab Mode
Scan here to switch to Flash Mode from the default Trigger Mode. In 
Flash mode, the MS840B will function automatically. It will scan at a set 
interval.
Flash Mode
Flash Mode
SETTINGS AND CONFIGURATION
The following section covers the most common 
conguration settings for your MS840B scanner. 
For additional conguration options please visit 
unitechscanners.com/MS840B and select the 
“Download” tab. You will nd the User’s Manual and a 
variety of other resources. 
Scan here to begin pairing the MS840B using the cradle. 
Begin Pairing
Cradle Mode 
Cradle Mode
Step 3:
Power On
Step 1:
Switch the power button to the on position.