The SY203-SF2SNM(C) from Sinclair Technologies is a Base Station Antenna with Frequency 143 to 149 MHz, Frequency Band 1 143 to 149 MHz, Gain 7.6 dBi, Vertical Beamwidth 61 Degrees, Horizontal Beamwidth 87 Degree. Tags: Yagi. More details for SY203-SF2SNM(C) can be seen below.