The ST221-SF1SNF(FXXXX) from Sinclair Technologies is a Antenna with Frequency 138 to 163 MHz, Bandwidth 2.5 MHz, Gain 2.1 dBi, Power 300 W, Operating Temperature -40 to 60 Degree C. Tags: Low Profile. More details for ST221-SF1SNF(FXXXX) can be seen below.