The HomeTronix Food Dehydrator uses a Flow-Drying system to slowly extract moisture & preserve foods by using low levels of heat (35-70°C). Removing the moisture inhibits the growth of bacteria an helps to preserve the food.HomeTronix dehydrator has 7 tiers for conveniently preserving multiple food types, with an adjustable temperature control allowing you to dry different types of food at the correct temperatures. Built in is the motor, fan and ventilating function, as well as a safety overheating protection device. The drying trays are easy to wash and measure 30cm x 23cm, and thicker cut foods can be used without hassle.Dehydrating food is practiced around the world as a natural method of preservation, which dates back to ancient times.