Enables cannabinoid receptor activity. Involved in several processes, including negative regulation of GABAergic synaptic transmission; negative regulation of mast cell activation; and negative regulation of nitric-oxide synthase activity. Located in dendrite and neuronal cell body. Is extrinsic component of cytoplasmic side of plasma membrane. Used to study Huntington's disease; arthritis; and sciatic neuropathy. Biomarker of pancreatitis. Orthologous to human CNR2 (cannabinoid receptor 2). [provided by Alliance of Genome Resources, Apr 2022]