What is the opinion of Reddit about the
Bluetooth Transmitter – iKross 3.5mm A2DP Bluetooth 3.0 Wireless Transmitter – Black for Home PC Headphone Stereo Speaker and More?

You might be SOL for now. Bluetooth headphones don’t work with the Switch at the moment. You could use one of these https://www.amazon.com/Bluetooth-Transmitter-Wireless-Headphone-Speaker/dp/B013CVY9FA and use any pair of BT headphones you can think of, but that’s really the only wireless option AFAIK

Would something like this not work?
http://www.amazon.com/Bluetooth-Transmitter-Wireless-Headphone-Speaker/dp/B013CVY9FA