XFQ SEL V/OFF/T 28V BLK 071-01282-0065KFS 598A Control Display Unit | Black Faceplate, 136.975MHz, 28V, VOLUME/ON/OFF/TESTThe KFS 598A is the control/display unit for the KTR 908 VHF communications transceiver. The digital gas discharge display simultaneously shows readouts of active and standby fre..