SDKs for android/iOS and unity

Hey,

So it's not the android SDK itself, but other android sdk's that I'm asking about. For example, Microsoft Band has an Android SDK, Razer Nabu has an android SDK and I'd like to use them for things in my unity game that I'm making (for android and eventually iOS as well)

I've never had to use just an android sdk in Unity before so I'm wondering if it is possible and if there is an easy way to do it. Would I just drop the sdk into my Android/iOS folders and then call them in my code or is there some place specific that I have to put them?

Thanks for any help :)