1. In-situ pre-freeze drying, one-button start. 2. Adjustable temp. & controllable production process, with program operation prompt function. 3. Multi-stage temp.control program can be set, the program parameters can be modified during the operation. 4. Touch screen, can set password, display drying curve. 5. The square tray is not easy to deform, easy to operate &easy to clean. 6. Vacuum protection to ensure the drying effect of materials. 7. Drying chamber adopts a high light transmission colorless transparent plexiglass door, which can clearly observe the change process of the material during the operation. 8. Whole process of freeze-drying is automatically controlled, program mode or vacuum mode can be selected.