Some speakers and headphones let you speed up the pairing process with NFC, which is pretty convenient, but now devices running Android 6.0 and above will get yet another, even better option: Fast Pair.
This new approach uses Bluetooth Low Energy and your Android phone’s location to automatically discover Bluetooth accessories in close proximity and then automatically connect with a tap. It even shows a picture of the product you’re using.
When you’ve got a Fast Pair-enabled device nearby (and there are less than a handful of them to start), your Android smartphone will fetch the device’s product image, product name, and companion app — if one exists — from Google’s servers.The actual pairing process still uses “classic Bluetooth,” so Google isn’t making any claims about improved connection reliability. But Bluetooth 5 should help in that regard as more phones and headphones, speakers, etc. are released with it.