Enables voltage-gated potassium channel activity. Involved in potassium ion export across plasma membrane. Acts upstream of or within potassium ion import across plasma membrane. Predicted to be integral component of plasma membrane. Is expressed in brain; brain meninges; and heart. Orthologous to human KCNK5 (potassium two pore domain channel subfamily K member 5). [provided by Alliance of Genome Resources, Apr 2022]