The SY307-SF10SNM(ABK) from Sinclair Technologies is a Base Station Antenna with Frequency 335 to 345 MHz, Frequency Band 1 335 to 345 MHz, Gain 12.1 dBi, Vertical Beamwidth 40 Degrees, Horizontal Beamwidth 45 Degree. Tags: Yagi. More details for SY307-SF10SNM(ABK) can be seen below.