Calcium-independent receptor of low affinity for alpha-latrotoxin, an excitatory neurotoxin present in black widow spider venom which triggers massive exocytosis from neurons and neuroendocrine cells. Receptor probably implicated in the regulation of exocytosis. Forms a heterodimer, consisting of a large extracellular region non-covalently linked to a seven-transmembrane moiety. Ubiquitously expressed. Proteolytically cleaved into 2 subunits, an extracellular subunit and a seven-transmembrane subunit. Belongs to the G-protein coupled receptor 2 family. Adhesion G-protein coupled receptor (ADGR) subfamily.