Enables DNA-binding transcription activator activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Involved in positive regulation of transcription by RNA polymerase II. Acts upstream of or within several processes, including cellular response to leukemia inhibitory factor; regulation of genetic imprinting; and spermatid development. Located in cytoplasm and nucleus. Part of protein-containing complex. Is expressed in early conceptus; gonad; tail; and ureter. Orthologous to human ZFP42 (ZFP42 zinc finger protein). [provided by Alliance of Genome Resources, Apr 2022]