Enables RNA polymerase II cis-regulatory region sequence-specific DNA binding activity and voltage-gated potassium channel activity. Involved in negative regulation of apoptotic process. Predicted to be located in plasma membrane. Predicted to be integral component of plasma membrane. Orthologous to human KCNH8 (potassium voltage-gated channel subfamily H member 8). [provided by Alliance of Genome Resources, Apr 2022]