Receptor for somatostatin 28 and to a lesser extent for somatostatin-14. The activity of this receptor is mediated by G proteins which inhibit adenylyl cyclase. Increases cell growth inhibition activity of SSTR2 following heterodimerization. {ECO:0000269|PubMed:12072395, ECO:0000269|PubMed:7908405, ECO:0000269|PubMed:8078491, ECO:0000269|PubMed:8373420}. This is the function of SSTR5 (somatostatin receptor 5, ENSG00000162009).