The NESCO FD-1040 Gardenmaster Digital Pro Dehydrator is ideal for drying and preserving large amounts of fruits, vegetables, herbs and jerky. This dehydrator comes with four trays (15.5" diameter) and expands up to 20 trays so you can dry large quantities at once, with no tray rotation needed. The digital timer is programmable for up to 48 hours of drying time. The NESCO FD-1040 Gardenmaster Digital Pro Dehydrator provides the drying power that generates maximum speed and quality for dehydrating your favorite foods. Additional Add-A-Trays (SKU: TR-2) sold separately.