The RSF-2442.000-79000-1109-TR-NS2 from Raltron is a Band Pass Filter with Frequency 2402.5 to 2481.5 MHz, Bandwidth 79000 kHz, Center Frequency 2442 MHz, Insertion Loss 1.7 to 2.6 dB, Rejection 42 to 27 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-2442.000-79000-1109-TR-NS2 can be seen below.