I agree with ko6jw, high-profile excellent 2m/70cm ham antenna designed to transmit on those frequencies, and will receive well on most others with a few nulls here and there. EXCELLENT for train stuff in the 160 MHz area and anything on UHF 440-460, doesn't do so well in the 700-900 mhz range. a company called watson makes an identical antenna (model W-881) that is marketed as a wide-band receive antenna from 25-1900 MHz but in comparison to an old rat shack 800 MHz or remtronix single band antenna it lacks. usually an antenna for a dedicated single band will outperform a multi-band antenna (in most cases). the diamond is worth $10 at a ham fest
at the end of the day, that antenna may function well for your application, type of radio, location etc, i'd keep it as a spare. then soon you'll have over 100 scanner antennas in a drawer like me haha.