notification

Hi I wanted to ask how can I decide who to send notification emails?
Let me explain better in the notification section let's create our notification and the only possible option is: "all devices".
Let's say that as a user I have 10 media and I'm interested in notifying just 3 media how do I do?

What media are you talking about?

Sorry no media i write error.
Let's say that as a user I have 10 machine and I'm interested in notifying just 3 machine how do I do?

I think the word you are looking for is "device" or "vehicle". If you want notification to be sent only for specific devices, don't tick "all devices" checkbox and just link your devices to the notification from devices menu.