Predicted to enable identical protein binding activity; lithium:proton antiporter activity; and sodium:proton antiporter activity. Predicted to be involved in several processes, including flagellated sperm motility; regulation of insulin secretion involved in cellular response to glucose stimulus; and sodium ion transport. Predicted to act upstream of or within positive regulation of osteoclast development. Located in intracellular vesicle and mitochondrial inner membrane. Orthologous to human SLC9B2 (solute carrier family 9 member B2). [provided by Alliance of Genome Resources, Apr 2022]