Enables voltage-gated potassium channel activity. Acts upstream of or within potassium ion import across plasma membrane. Predicted to be located in plasma membrane and synaptic vesicle. Predicted to be integral component of plasma membrane. Is expressed in cerebral cortex; early conceptus; and secondary oocyte. Human ortholog(s) of this gene implicated in Birk-Barel syndrome. Orthologous to human KCNK9 (potassium two pore domain channel subfamily K member 9). [provided by Alliance of Genome Resources, Apr 2022]