Enables calcium ion binding activity and potassium channel regulator activity. Involved in regulation of potassium ion transmembrane transport. Part of voltage-gated potassium channel complex. Is expressed in brain; dorsal root ganglion; meninges; retina; and spinal cord. Orthologous to human KCNIP4 (potassium voltage-gated channel interacting protein 4). [provided by Alliance of Genome Resources, Apr 2022]