Enables calcium, potassium:sodium antiporter activity. Acts upstream of or within bone mineralization; cellular calcium ion homeostasis; and regulation of gene expression. Located in cell periphery. Is expressed in several structures, including alimentary system; central nervous system; dorsal root ganglion; musculature; and neural retina. Orthologous to human SLC24A3 (solute carrier family 24 member 3). [provided by Alliance of Genome Resources, Apr 2022]