Enables voltage-gated calcium channel activity. Acts upstream of or within flagellated sperm motility; sodium ion transport; and sperm capacitation. Located in acrosomal vesicle and endoplasmic reticulum. Part of CatSper complex. Is expressed in ductus deferens; epididymis; ileum; prostate gland; and testis. Orthologous to human CATSPER3 (cation channel sperm associated 3). [provided by Alliance of Genome Resources, Apr 2022]