Meykey Food Dehydrator with Temperature Controller, Fruit-Meat Dryer, 5 Tray Digital Dehydrator with Timer, BPA-Free, 250W/LCD

Can you use parchment paper to make fruit leather in this dehydrator?

can you dehydrate pastas and dishes to take camping or is it mostly fruit?

How does the moist air exit the device?

I see that someone else has asked if they buy additional trays. I have tried looking up the manufacturer to no avail. Anyone know ?