Kenwood KHS 21 voeding 5:1) and wide frequency range 5:1) and wide frequency range of 144 to 430 MHz make this antenna ideal for various amateur radio applications 5 kW PEP – ideal for high power transmitters This headset has an earpiece on one side and a headrest bracket on the other side the KHS 21 has a VOX function that works with transceivers that also have this function