The Laird B1323 base-loaded 5/8 wave antenna without spring operates within the VHF frequency range, 132 – 174 MHz. This VHF mobile antenna offers high performance with a gain of 3 dB. Maximum power input is 200 W.brbrThe 55 in whip antenna uses a low-loss coil form to add dimensional and frequency stability while maintaining a low profile design. This vehicle antenna has a base constructed of an ABS material that is molded around solid brass inserts to create an indestructible housing that is virtually leak proof.brbrThe Laird VHF mobile antenna requires NMO mount to be ordered separately.