Enables beta-N-acetylglucosaminidase activity; carbohydrate binding activity; and identical protein binding activity. Involved in N-acetylglucosamine metabolic process. Located in lysosome. Human ortholog(s) of this gene implicated in Sandhoff disease and spinal muscular atrophy. Orthologous to human HEXB (hexosaminidase subunit beta). [provided by Alliance of Genome Resources, Apr 2022]