The BPF-1575S from RF Bay is a Band Pass Filter with Frequency 1.565 to 1.585 GHz, Bandwidth 20 MHz, Center Frequency 1.575 GHz, Insertion Loss 1.8 dB, Rejection 45 to 55 dB. Tags: Module with Connectors, RF SAW Filter. More details for BPF-1575S can be seen below.