The SY203-SF4SNM(E) from Sinclair Technologies is a Base Station Antenna with Frequency 152 to 159 MHz, Frequency Band 1 152 to 159 MHz, Gain 7.6 dBi, Vertical Beamwidth 61 Degrees, Horizontal Beamwidth 87 Degree. Tags: Yagi. More details for SY203-SF4SNM(E) can be seen below.