Diamond Original NR72BNMO Dualband Mobile Antenna The Diamond NR72BNMO is a 2 meter and 440 MHz (70 cm) mobile antenna. It is a 1/4 wave on 2 meters providing 2.15 dBi gain and a 1/2 wave on 440 providing 2.15 dB gain. This antenna can handle up to 100 watts. VSWR is less than 1.5:1. A hexagonal (Allen) wrench is included for adjustment. This antenna is approximately 13.8 inches (0.38 m) high. The antenna is black, very well built and looks a bit like a cellular antenna. The connector type is NMO. Remarks: Not recommended for use with magnet mount. Grounding required.