A:AnswerYou need to change from where the sound is to come from. I had to go into settings and change the bluetooth to be on and pair it from inside there. So that the Bluetooth is on and that the device has been paird to the computer. It did not directly / automagically come up as connected by just plugging it into the computer. Small work, but it did the trick for me.
A:AnswerI have not used this plug-in with a fitbit, but I have used it with several other devices. This is a USB widget that I have used with a couple of laptops to allow them to interface with a number of Bluetooth devices. Currently I am using a Dell laptop at work and an HP at home. The widget works for both. Primarily I use Bluetooth to interface audio with online meetings and seminars, although I noticed that it also interfaces with my Samsung Gear watch.
A:AnswerThis is a generic bluetooth adapter. It's not application specific. I use it for conferencing, which is the same as what you want to use it for so, you should have no trouble.
A:AnswerYou may have to go to Bluetooth settings in your OS (Windows 10 here) and make your desktop machine "Discoverable" . But, it put a Bluetooth icon in my system tray with Add a Bluetooth Device - Allow a Bluetooth Device to connect - Show Bluetooth Devices. Not "certain" it'll work with that specific hardware though.