The RSF-433.920-320-5050-TR from Raltron is a Band Pass Filter with Frequency 433.76 to 434.08 MHz, Bandwidth 320 kHz, Center Frequency 433.92 MHz, Insertion Loss 4 dB, Rejection 10 to 45 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-433.920-320-5050-TR can be seen below.