Patented technology keeps the product fresh and preserves the potency, color, shape and nutrition of any organic material. Freeze drying retains 97% of the nutritional value with a 25-year shelf life. The freeze dryer has built-in intelligence. It automatically and perfectly manages the freeze drying process. 3.75 sq ft of tray space. Shelf unit has shelves for 5 trays and 3 L of ice capacity. 110 V outlet. Maintenance: simply filter and replace oil. Comes standard with 7.2 CFM vacuum pump and 1 quart of vacuum pump oil. Overall product dimensions are 16.5 in W x 18.5 in D x 25 in H and shipping weight is 139 lbs.