The RSF-2350.000-100000-1109-TR-NS4 from Raltron is a Band Pass Filter with Frequency 2300 to 2400 MHz, Bandwidth 100 MHz, Center Frequency 2350 MHz, Insertion Loss 2 to 2.5 dB, Rejection 42 to 22 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-2350.000-100000-1109-TR-NS4 can be seen below.