Potassium channel subunit. Modulates channel activity by shifting the threshold and the half-maximal activation to more negative values (By similarity). Heteromultimer with KCNB1, KCNC1 and KCNF1. Does not form homomultimers (By similarity). The segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids at every third position. Belongs to the potassium channel family. V (TC 1.A.1.2) subfamily. Kv8.2/KCNV2 sub-subfamily.