Enables DNA-binding transcription repressor activity, RNA polymerase II-specific and RNA polymerase II transcription regulatory region sequence-specific DNA binding activity. Involved in negative regulation of transcription by RNA polymerase II. Acts upstream of or within positive regulation of transcription by RNA polymerase II. Predicted to be located in cytosol and nucleoplasm. Is expressed in several structures, including branchial arch; central nervous system; early conceptus; genitourinary system; and sensory organ. Orthologous to human KLF12 (KLF transcription factor 12).