The RSF-345.000-270-5050-TR from Raltron is a Band Pass Filter with Frequency 344.865 to 345.135 MHz, Bandwidth 270 kHz, Center Frequency 345 MHz, Insertion Loss 4 dB, Rejection 15 to 40 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-345.000-270-5050-TR can be seen below.