The BP456A90 from PLEXSA MANUFACTURING is a Band Pass Filter with Frequency 4.45 to 5.85 GHz, Insertion Loss 2.5 to 3.0 dB, Rejection 50 to 80 dB, Lower Rejection 50 to 18 dB, Return Loss 9.54 dB. Tags: Module with Connectors. More details for BP456A90 can be seen below.