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 square feet of tray space. Shelf unit has shelves for 5 trays and 3 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 16.5” W x 18.5” D x 25” H and shipping weight of 139 lbs.