Currently only certain Macs support Bluetooth discovery. This is not yet supported on Windows.
Bluetooth discovery allows devices to see each other even when they may be on different subnets or when Bonjour and mDNS traffic isn't available. It is important to note that Bluetooth is only available for discovery. You cannot connect to a device if it isn't on the same network.
To use Bluetooth discovery both devices need to be in range of each other. Maximum Bluetooth range varies, but on average is about 30 feet.
When AirParrot sees an Apple TV with Bluetooth enabled, it will show this icon . Click the icon and mirroring should begin.
Your Mac will need to be equiped with a Bluetooth LE chip set also. To find out if your Mac has this chip set follow the instruction below:
To determine your Mac's Bluetooth version
Click the menu.
Select About This Mac.
Click on the More Info... button.
Click on the System Report... button.
Select Bluetooth from the sidebar on the left, underneath "Hardware."
Scan down the list of information until you find "LMP Version."
If your Mac is equipped with Bluetooth 4.0, LMP Version will say 0x6. Anything lower than that is an older version of Bluetooth.