The ST321R-SF4SNF(CWH) from Sinclair Technologies is a Antenna with Frequency 470 to 490 MHz, Bandwidth 20 MHz, Gain 2.1 dBi, Power 30 W, Operating Temperature -40 to 60 Degree C. Tags: Monopole. More details for ST321R-SF4SNF(CWH) can be seen below.