From Nesco, the American Harvest Gardenmaster Digital Pro Dehydrator features: 1000 Watt Powerhead Digital Display with Adjustable Thermostat and Timer Digital timer is programmable for up to 48 hours of drying time Converga-Flow System Provides even heat distribution without having to rotate trays. BPA Free Drying Trays Made of high-quality food grade plastic. Each tray provides 1.2 sq. ft. of drying space. Comes with four trays (15.5 diameter) and expandable Up To 20 Drying Trays Increase the overall drying area by expanding your dehydrator with additional trays. Recipe Booklet Great recipes, tips and tricks to help you get the most of your dehydrator. Measures approx. 15.5" x 15.5" x 9.5" What's in the Box: 1 Fruit Roll Sheet 1 Clean-A-Screen Sample of Jerky Seasoning & Cure 52-page recipe & instruction book Imported.