VH-144S-VHF Mobile Antenna Features: FREQUENCY : 136-174MHz (by WHIP CUT TUNING) GAIN : 3dBd V.S.W.R. LESS THAN 1.5 IMPEDANCE : 50 OHMS POWER CAPACITY : 300W CONNECTION : UHF PLUG(PL-259) STINLESS STEEL SHOCK SPRING LENGTH : 147 cm