Ligand-gated cation channel that allows the movement of sodium and potassium monoatomic cations across cell membranes when activated by zinc (Zn2+), copper (Cu2+), and changes in pH (PubMed:26872532). Could also transport cesium (PubMed:26872532). . This is the function of Ensembl gene identifier ENSG00000186919 (ZACN, zinc activated ion channel).