Biolab Biological Safety Cabinet Class II Series is engineered specifically for laboratory operations that require user and product protection. Operates with a negative air pressure for personnel protection and HEPA filtered laminar airflow for product protection. Suitable for microbiological and research applications that do not involve radioactive substances and toxic contaminants. - Small dimension, save space - Centrifugal fan, speed adjustable; H14 HEPA filter - Motorized front window: The front window is motorized for convenient, one-hand operation - Audio and visual alarm:Abnormal airflow velocity, Filter replacement, Front window at unsafe height, High filter pressure alarm