General Specifications : Fast cooling/Fast Defrosting System utilizing Operon's internationally patented Cryogenic refigeration system(patent No.:0337991) and water vapor cryo cooler technology - Compact and efficient with the Square type of drying chamber - Maximum cold trap temperature of -86~-120collects all vapors and protects vacuum pump - 40mm of clear acrylic chamber and trap door enables monitoring thoughtout freeze drying process