Zoom 4312A - Manual (Page 48)

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You will be asked for the Bluetooth passkey in the window that appears.
5. Enter the passkey under [Bluetooth Passkey (PIN code)], and then click on the
[OK] button.
Service detection and COM port creation will be performed automatically.
The [Add New Connection Wizard (Create Connection Destination)] window will
appear.
6. Enter the connection name, user name and password, then click on the
[Next] button.