D-Link DBT-120 User Manual page 35

In the Discoverable devices... dialog box, highlight the device to be
discovered and click the OK button. Multiple devices can be selected at the
same time using SHIFT + click and/or CTRL + Click.
Note: To add a device to the list of devices to be discovered, that device must
be within range of the Bluetooth radio; devices that are not within radio range will
not appear in the list of devices in the Discoverable devices... dialog box.
Report only a specific class of device
From the Bluetooth Configuration Panel, in the Discovery tab, select
"Report only Selected Bluetooth devices" from the drop-down list and then
click the Add Device button.
•
In the Discoverable devices... dialog box, select "Allow this computer to
discover all devices of a specific class or a specific type of device
within a specific class."
Discovery Tab – Discoverable Devices
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Discovery Tab – Discoverable Devices