User's Manual Part 1

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Address--the Bluetooth Device Address (Bd_Addr) of this device. This information is
permanently associated with the Bluetooth hardware during the manufacturing
process and cannot be changed.
* Accessibility:
Allow other devices to connect, when this option is enabled, other devices are
permitted to connect to this device. Two mutually exclusive sub-options provide
additional refinement. They are:
* All devices--select this option to allow all devices to connect.
* Paired devices only--select this option to allow only devices that have a paired
relationship.
Other devices can discover me, when this option is enabled, other Bluetooth devices
can see and report this device. Even though remote devices cannot discover this
device unless this option is checked, if a remote device has this device's Bluetooth
Device Address, that device may still be able to connect to this device.