ipad air bluetooth

Since you posted in the iPhone forum I'm going to guess that you are asking how to make your iPad Air connect with your iPhone via Bluetooth. If that is what you are trying to do, note that the 2 devices are not designed to pair via Bluetooth except for Personal Hotspot and then only if your cellular plan supports it. If you are trying to use Handoff/Continuity between the 2 devices note that they do not pair for that -- Bluetooth needs to be on for both but they aren't paired.

If you mean an audio Bluetooth device then you can go to sitting then choose Bluetooth open it then tab the name of the device you want. If you mean between iPhone and iPad like the one before me said then you can use airdrop if your iPhone is iphone 5 or higher. But if you mean any other device, you can't make pair between them, but you can still use cloud storage or transfer app in order to move any kind of file you want.

out of the box this is what is supported

iOS: Supported Bluetooth profiles - Apple Support

many bluetooth devices needs to be put in pairing / discovery mode before you can connect them you should read the manual of the device about how you do that

Liliblanche wrote:

How can I make the bluetooth device work on my ipad air 2

What is "the bluetooth device"?