The SY250-SF2SNM(E) from Sinclair Technologies is a Base Station Antenna with Frequency 138 to 174 MHz, Frequency Band 1 138 to 174 MHz, Gain 9.1 dBi, Vertical Beamwidth 60 Degrees, Horizontal Beamwidth 80 Degrees. Tags: Yagi. More details for SY250-SF2SNM(E) can be seen below.