The SY203-SF3SNM(C-ABK) from Sinclair Technologies is a Base Station Antenna with Frequency 148 to 154 MHz, Frequency Band 1 148 to 154 MHz, Gain 7.6 dBi, Vertical Beamwidth 61 Degrees, Horizontal Beamwidth 87 Degree. Tags: Yagi. More details for SY203-SF3SNM(C-ABK) can be seen below.