Three protection: operator, sample and environment. Airflow system: 70% air recirculation, 30% air exhaust A2 cabinet is suitable for working with microbiological research in the absence of volatile or toxic chemicals and radionuclide. Advantage: 1. Motorized front window. 2. Large lcd display, all information displayed. 3. Automatic air speed adjustable with filter block. 4. Side & back wall is made up of single piece stainless steel. 5. Interlock function: uv lamp and front window; uv lamp and blower, fluorescent lamp; blower and front window. 6. Front 1slanted to offer operator comfort while working for long time, reduce glare and maximize reach into the work area.