Portable Radio Communications, Model 25. A back-packed FM receiver-transmitter used for short-distance communications. The range of the radio was 5-10 kilometers, depending on the weather, unless attached to a special, nonportable antenna which could extend the range to 20-30 kilometers

The "Prick-25" was the standard backpack field radio for most Marine units. It came with a 4-foot metal "tape" antenna for use on the move, and a 10-foot, collapsible "whip" antenna for stationary use.