16-inch 1200P triple portable monitor laptop screen extender
It clips onto the back of the laptop and swings out two more screens. Email on one, the gradebook on another, the thing you are actually working on in the middle. Fold it up and it goes in the bag.
This is the video people watch most, and it is the product I get asked about most.
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If you want the details, here they are.
Check your laptop size against the listing (this one fits roughly 13 to 17 inch). You need two USB-C ports with video out, or one plus an HDMI. The video shows the cables.
I made a video about this one. Amazon shows it on the product page, so the link below opens it there.
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