Pentax 3 User Manual page 36

You may enter from 1 to 16 alphanumeric characters for your
PIN code. Click on the "Save PIN" button to transmit your PIN
code to the printer. CAUTION: For security purposes, the
Bluetooth PIN code cannot be programmed using the Bluetooth
port. Please use the USB cable or IRDA port to program the PIN
code.
Note that the PIN code for your printer will be printed on the
printer's built-in test pattern should you forget your code, and
you may create a new code at any time by using the
Configuration Utility.
If your OS or application requires a PIN code, the PASSWORD
for access as shipped from the factory is "default" (case
sensitive).
Please refer to "Connecting to Your Computer" on page 15 for
information on physical connections between your computer
and your PocketJet Bluetooth printer.
When you have completed the PIN and Local Name, click on
"Save PIN" and/or "Save Name," and then click on "Close."
Note: The website
http://www.pentaxtech.com/Products/pocketjets.html
contains the most current PocketJet driver as well as information
including FAQ's and tips for connecting to Bluetooth devices.
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