How to change android device name?

I want to use Android Device Manager to locate my devices. The problem is that I have 20 android tablets from the same model and I want to change their name in the tablet, not ADM because it's a little harder to see which one I have. I read that exist an option in Settings>Developer > Change Host Name but, I can't found it.

Is there a way to change this name from device?

Thanks
I'm using Android 4.4 and 4.2

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