The RSF-823.000-1570-5050-TR from Raltron is a Band Pass Filter with Frequency 822.215 to 823.785 MHz, Bandwidth 1570 kHz, Center Frequency 823 MHz, Insertion Loss 5.2 to 6 dB, Rejection 22 to 12 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-823.000-1570-5050-TR can be seen below.