The SD210E-SF2P2LDF from Sinclair Technologies is a Base Station Antenna with Frequency 138 to 174 MHz, Frequency Band 1 138 to 174 MHz, Gain 4.1 dBi, Vertical Beamwidth 68 Degrees, Power 300 W. Tags: Dipole. More details for SD210E-SF2P2LDF can be seen below.