(that is a bag of dried bananas beside it ...I slice them longways so they dry quicker) I never pass up an over-supply of cheap, ripe fruit which has reached the end of its shelf-life.
This one does not have variable temperature and is supposed to be used for fruit and veg only. Meat should (in theory) be dried at a slightly higher temperature, but I have dried meat and fish in it very successfully - cut into strips and marinated before drying.
It is a great bit of kit for preparation for some long distance sailing, and has done very good service over the years. Even fruit leathers are possible - fruit pulp (sweetened with a bit of pureed banana if needed), gets spread out on freezer paper on the trays - takes a little longer but is just as effective.