How does find my iPhone work on iPod touch?

So iPhones can access the internet anywhere they are (using sim) but iPod touches can't, so how does the find my iPod work.

It doesn't.

I've tried the app on my ipod touch 4g to try and find my iphone 4s but i honestly never used it i just deleted the app and i'm currently selling my ipod touch 4g. Your best bet is to download the app and follow the steps to set it up.

When you are connected to a Wi-Fi network on The iPod you log in using your Apple I. D user name and password. Then after you log in you click locate then once the iPhone/iPod is located you will have the option to lock the device, send a message across the screen, or remote wipe meaning delete everything off of the device. Hope this helps.

It works in the same way as iPhones, but only when the iPod is connected to a Wi-Fi network. You can set iCloud up to send you an email as soon as the iPod is found, seeing as it won't always be connected.