SATO WS4 Series Operator's Manual page 88

6 SATO WS4 Printer Utility Work with SATO WS4 Printer Utility
the key, click Next.
6. The computer will try to connect the printer. If it succeeds, you'll see the
successful message. Take a note of the outgoing COM port and click Finish.
Note If you forget the port number, in the Bluetooth Devices dialog box, click
the COM Ports tab to see the virtual COM port assigned to your printer.
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