KX-155 / Nav/Comm - 14V Prices May Vary. The most popular NAV/COM on the market. Electronic digital display with flip-flop frequencies on COM & NAV . Offers a 760 channel, 10 watt transmitter, a 200 channel NAV, and is available with or without internal 40 channel GS. Available in either 14 or 28 volt DC. TSO'd. Systems include mounting rack, and install kit. Specify aircraft voltage when ordering.