The CTL-22C is a Digital Display Communication Control that provides tuning for units with either 8.33 KHz or 25 KHz spacing. The CTL-22/22A Controls have a four and one half digit display and the CTL-22C display has five and a half digits. The CTL-22C and CTL-23C controls offer a strap-selectable option for providing COMM tuning in 8.33-kHz increments from 118.000 to136.992 MHz. The CTL-22C is used for controlling the Proline II communication transceivers such as VHF21A, VHF21B, VHF22A and VHF22B. The CTL-22C provides nonvolatile storage of preset frequencies besides the active and preselect frequencies that are displayed. The CTL-22C can be used as a  direct replacement for the CTL-22.The CTL-22C is available with a black or gray bezel, 5V or 28V lighting, variations of ON/OFF selection and volume control.