Features: 1. Stainless steel inner chamber, round angle structure,adjustable shelves. 2. Microprocessor control system, LCD display. 3. CFC-free refrigeration and gentle breeze circulation. 4. Double-layer glass observation window. 5. Function of self-diagnosis, sensor fault alarm and over-temperature protection. Optional accessories: a. Desk printer b. RS485 interface for software connection c. BOD sockets d. ?50mm test port.