The SY307R-HF3SNF from Sinclair Technologies is a Base Station Antenna with Frequency 430 to 450 MHz, Frequency Band 1 430 to 450 MHz, Gain 12.1 dBi, Vertical Beamwidth 42 Degrees, Horizontal Beamwidth 48 Degree. Tags: Yagi. More details for SY307R-HF3SNF can be seen below.