Diamond SG-M911 (original antenna manufactured in Japan). New sleek and stylish tri-band model of the prestigious Japanese manufacturer. the SGM911 is a high performance tri-band antenna covering the frequencies of 50 - 144 - 430 MHz. Length: 1.07 mts. Gain: 50 MHz - 2.15 dBi / 144 Mhz. 3.0 dBi / 430 Mhz. 5.8 dBi. Maximum power: 60 watts Connector PL. more Manufacturer: diamond Reference SGM911