Putative voltage-gated potassium channel. Heteromultimer with KCNG3, KCNG4 and KCNV2. Interacts with DLG1. Detected in heart, brain, liver, skeletal muscle, kidney and pancreas. 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. F (TC 1.A.1.2) subfamily. Kv5.1/KCNF1 sub-subfamily.