Honestly, it's amazing and it's an adapter that allows you to use bluetooth headphones/earphones on Nintendo Switch/Switch Lite. It's easy to set up by plugging into a switch (bottom USB port), it connected my Mpow Bluetooth wireless headphones with no issues. Also works on PC and PS4. Comes with a main adapter and also has a couple of extra PC connections. I didn't even have to go into settings. The seller is very polite and also sent me an email prior to the delivery letting me know if there was any problem with the delivery or anything. You are welcome to contact me. do you see it This is a very caring seller who is very impressed they went above and beyond even for a $14 adapter!