What is it?
It's a screen / monitor.
What is it?
It's a laptop.
What is it?
It's a keyboard.
What are they ?
They'are speakers.
What is it?
It's a tablet.
What is it?
It's a printer.
What is it?
It's a TV.
What is it?
It's a camera.
What are they ?
They'are headphones.
What is it?
It's a computer / desktop computer / PC .
What is it?
It's a mobile phone.