The RSF-2442.000-79000-1109-TR-NS1 from Raltron is a Band Pass Filter with Frequency 2402.5 to 2481.5 MHz, Bandwidth 79000 kHz, Center Frequency 2442 MHz, Insertion Loss 1.3 to 2.4 dB, Rejection 44 to 15 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-2442.000-79000-1109-TR-NS1 can be seen below.