The SD210E-SF2P4LDF from Sinclair Technologies is a Base Station Antenna with Frequency 138 to 174 MHz, Frequency Band 1 138 to 174 MHz, Gain 4.6 dBi, Vertical Beamwidth 68 Degrees, Horizontal Beamwidth 210 Degrees. Tags: Dipole. More details for SD210E-SF2P4LDF can be seen below.