Enables peptide hormone binding activity. Involved in several processes, including adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway; oocyte maturation; and positive regulation of cAMP-mediated signaling. Located in plasma membrane. Human ortholog(s) of this gene implicated in cryptorchidism. Orthologous to human RXFP2 (relaxin family peptide receptor 2). [provided by Alliance of Genome Resources, Apr 2022]