Calcium, potassium:sodium antiporter that transports 1 Ca(2+) and 1 K(+) in exchange for 4 Na(+) (PubMed:12379639, PubMed:26631410). Controls the rapid response termination and proper regulation of adaptation in olfactory sensory neurons (OSNs) which subsequently influences how odor information is encoded and perceived (By similarity). May play a role in calcium transport during amelogenesis (PubMed:23375655, PubMed:24621671). {ECO:0000250|UniProtKB:Q8CGQ8, ECO:0000269|PubMed:12379639, ECO:0000269|PubMed:23375655, ECO:0000269|PubMed:24621671, ECO:0000269|PubMed:26631410}. This is the function of SLC24A4 (solute carrier family 24 member 4, Ensembl gene identifier ENSG00000140090).