Monitor:
You use a monitor for viewing information.

Watch:
You use your watch for checking the time.

Projector:
Projecting your screen onto the wall.

Headphones:
The headphones purpose is if you're trying to listen to a video only you are able to hear it.

Speakers:
Speakers purpose is amplifying your voice so everyone in the room can hear your voice as if you were right in front of them.

Router:
Router allows you to connect several devices to the internet.

Microphone:
Microphones are how your voice plays through speakers.

Phones:
Can be used for calling, messaging, or even saving important notes.

Microwaves:
MWs are used for heating up premade foods.