The ST321R-SF5SNF(CWH) from Sinclair Technologies is a Antenna with Frequency 490 to 512 MHz, Bandwidth 22 MHz, Gain 2.1 dBi, Power 30 W, Operating Temperature -40 to 60 Degree C. Tags: Monopole. More details for ST321R-SF5SNF(CWH) can be seen below.