Enables RNA polymerase II transcription regulatory region sequence-specific DNA binding activity. Involved in cochlea morphogenesis and negative regulation of mesenchymal cell apoptotic process. Acts upstream of or within forebrain neuron differentiation; inner ear development; and sensory perception of sound. Predicted to be located in nucleoplasm. Is expressed in several structures, including brain; cranium; ear; embryo ectoderm; and foregut-midgut junction. Human ortholog(s) of this gene implicated in X-linked deafness 2. Orthologous to human POU3F4 (POU class 3 homeobox 4). [provided by Alliance of Genome Resources, Apr 2022]