The AM1538B1386 from Anatech Electronics is a Band Pass Filter with Frequency 1.51 to 1.55 GHz, Bandwidth 41 MHz, Center Frequency 1538.5 MHz, Insertion Loss 1.5 dB, Lower Rejection 30 dB @ 1626-1675 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1538B1386 can be seen below.