The SY307-SF12SNM(ABK) from Sinclair Technologies is a Base Station Antenna with Frequency 500 to 520 MHz, Frequency Band 1 500 to 520 MHz, Gain 12.1 dBi, Vertical Beamwidth 41 Degrees, Horizontal Beamwidth 55 Degree. Tags: Yagi. More details for SY307-SF12SNM(ABK) can be seen below.