The function of Ensembl gene identifier ENSG00000124780 (KCNK17, potassium two pore domain channel subfamily K member 17) is as follows. K(+) channel that conducts voltage-dependent outward rectifying currents upon membrane depolarization. Voltage sensing is coupled to K(+) electrochemical gradient in an 'ion flux gating' mode where outward but not inward ion flow opens the gate (PubMed:11248242, PubMed:11263999, PubMed:26919430, PubMed:36063992). Homo- and heterodimerizes to form functional channels with distinct regulatory and gating properties (PubMed:36063992). Present in the cardiac conduction system where it may regulate action potential duration and beating frequency of cardiac myocytes (PubMed:24972929). Permeable to other monovalent cations such as Rb(+) and Cs(+) (By similarity) (PubMed:26919430). {ECO:0000250|UniProtKB:Q96T55, ECO:0000269|PubMed:11248242, ECO:0000269|PubMed:11263999, ECO:0000269|PubMed:24972929, ECO:0000269|PubMed:26919430, ECO:0000269|PubMed:36063992}.