The SD212E-SF2P2SNM(D04) from Sinclair Technologies is a Base Station Antenna with Frequency 138 to 174 MHz, Frequency Band 1 138 to 174 MHz, Gain 7.1 dBi, Vertical Beamwidth 36 Degrees, Power 300 W. Tags: Dipole. More details for SD212E-SF2P2SNM(D04) can be seen below.