How do I identify the model of my iPad, Mac, or Apple TV?

You can identify your iPad model by checking this Apple support webpage:

https://support.apple.com/en-us/HT201471

You can identify your Mac model by checking this Apple support webpage:

https://support.apple.com/en-us/102767

You can identify your Apple TV model by checking this Apple support webpage:

https://support.apple.com/en-us/HT200008