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. 6.5 square feet of tray space. Shelf unit has shelves for 7 trays and 4 liters of ice capacity. 110 volt 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 20” W x 25” D x 30” H and a shipping weight of 221 lbs.