The SY307R-HF1SNM from Sinclair Technologies is a Base Station Antenna with Frequency 403 to 430 MHz, Frequency Band 1 403 to 430 MHz, Gain 12.1 dBi, Vertical Beamwidth 42 Degrees, Horizontal Beamwidth 48 Degree. Tags: Yagi. More details for SY307R-HF1SNM can be seen below.