The RSF-1582.400-31200-1109-TR-NS5 from Raltron is a Band Pass Filter with Frequency 1566.8 to 1598 MHz, Bandwidth 31.2 MHz, Center Frequency 1582.400 MHz, Insertion Loss 1.3 to 2 dB, Upper Rejection 15 to 50 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-1582.400-31200-1109-TR-NS5 can be seen below.