The AM1575B88 from Anatech Electronics is a Band Pass Filter with Frequency 1574.4 to 1576.4 MHz, Bandwidth ± 1 MHz, Center Frequency 1575.4 MHz, Insertion Loss 4.5 dB, Rejection 20 to 30 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1575B88 can be seen below.