Enables calcium-activated potassium channel activity. Predicted to be involved in several processes, including cellular response to bile acid; cellular response to ethanol; and detection of calcium ion. Predicted to act upstream of or within ion transport. Is integral component of membrane. Part of voltage-gated potassium channel complex. Is expressed in arterial system; sensory organ; skeleton; and tarsus. Human ortholog(s) of this gene implicated in hypertension. Orthologous to human KCNMB1 (potassium calcium-activated channel subfamily M regulatory beta subunit 1). [provided by Alliance of Genome Resources, Apr 2022]