UM-102-UHF Mobile Antennas Features: SUPER STRONG MANETIC BASE FREQUENCY : 430-440 MHz( or 440-450 MHz) GAIN : 2.15 dBd V.S.W.R. ≦1.5 IMPEDANCE : 50 OHM POWER CAPACITY : 220W (MAX. ) 29φmm MINI. MAG. MOUNT; 9FT RG-174/U COAXIAL CABLE+ BNC PLUG ( or SMA PLUG )