Enables mRNA 3'-UTR AU-rich region binding activity. Involved in nuclear-transcribed mRNA catabolic process, deadenylation-independent decay and positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay. Acts upstream of or within mRNA catabolic process. Located in cytosol. Orthologous to human ZFP36L1 (ZFP36 ring finger protein like 1). [provided by Alliance of Genome Resources, Apr 2022]