Binds and inhibits voltage-sensitive potassium channels. Inhibits the vertebrate potassium channels Kv1.1/KCNA1, Kv1.2/KCNA2 and Kv1.3/KCNA3 with low affinity. Also weakly inhibits Kv7.1/KCNQ1 (10 uM of the toxin inhibits currents by 21.43%) (PubMed:22511981). Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta). Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 11 subfamily.