The key is very small and corresponds to the description. It only came with a minidisk to install drivers with no instructions for people who don't have a CD drive. I ended up going back to the product page which has a Dropbox link to the drivers needed to make this work. After the first launch, everything worked as expected with wireless headphones. The range appears to be about 15 feet or so. I ran into issues after unplugging my Bluetooth headphones and getting fed up with trying to connect later, resulting in two consecutive computer crashes (stop code/blue screen). All drivers were updated, I uninstalled and reinstalled everything and the same problem. At first everything worked fine, but after trying to reconnect, the computer froze. Later I just removed the dongle and plugged it into a different USB port and everything seems to be fixed. So maybe the first one was wobbly and caused the accident. Since then no more problems!
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