Larsen - VHF / UHF / 800 Tri-Band Antenna -- This tri-band antenna covers 150-165, 450-470 & 806-940 MHz bands. Ideal for Public Safety applications when the user needs multiple bands but also needs to limit antenna installations. In addition the NMO150/450/800 can be used as a scanner antenna or for the Ham bands. 2.1 db gain, 16.5" overall height. Standard NMO Mount base.