Enables RNA polymerase II transcription regulatory region sequence-specific DNA binding activity; histone acetyltransferase binding activity; and identical protein binding activity. Involved in several processes, including dauer larval development; neuron differentiation; and positive regulation of transcription by RNA polymerase II. Located in nucleus. Expressed in ABalappaap; ABalappaapp; and neurons. Human ortholog(s) of this gene implicated in hypotonia, ataxia, and delayed development syndrome. Is an ortholog of several human genes including EBF1 (EBF transcription factor 1); EBF2 (EBF transcription factor 2); and EBF4 (EBF family member 4).