Enables voltage-gated potassium channel activity. Acts upstream of or within potassium ion transport. Predicted to be integral component of plasma membrane. Predicted to be part of clathrin coat and voltage-gated potassium channel complex. Predicted to be integral component of membrane. Is expressed in heart. Human ortholog(s) of this gene implicated in autosomal dominant mental retardation 46. Orthologous to human KCNQ5 (potassium voltage-gated channel subfamily Q member 5). [provided by Alliance of Genome Resources, Apr 2022]