FREQUENCY: 144-148 MHz GAIN: 2.5 dB Over 1/4 Wave V.S.W.R: Less than 1.5:1 Through Band POWER: 50 W (max) FIELD TUNABLE CONNECTION: 14' of RG-58 Cable With PL-259 27-1/2" Copper Plated Whip With Black Finish. INSTRUCTIONS AND MOUNTING PACKAGE INCLUDED (NOTE: Some newer automobiles are equiped with "Passivated Glass" which does not permit on-glass antennas to work properly. Please check your owner's manual or your dealer for more information.)