Diamond Original NR73BNMO Dualband Mobile Antenna Antenna, Mobile, Black, NMO, Dual-Band, 2m, 70cm, 100 W, 33.5 in. The Diamond NR73BNMO dualband is a 2 meter and 440 MHz mobile antenna. It is a 1/2 wave on 2 meters providing 2.15 dB gain and a 2 5/8 wave on 440 MHz providing 5.3 dB gain. This antenna can handle up to 100/100 watts. A hexagonal (Allen) wrench is included for adjustment. This antenna is approximately 34 inches high. The coils and antenna are black. The connector type is NMO. This antenna does not include the mount or coax.