Food dehydrator has 500 Watts of drying power for even, consistent heat distribution and adjustable temperature control. The top-mounted fan prevents liquids from affecting the drying process, while Converga-Flow technology forces heated air down and horizontally across each tray for even drying that's four times faster than other dehydrators. Comes with 4 trays, and 2 extras, and a book with instructions and recipes. Expandable up to 12 trays (additional trays sold separately) Used three times.