The AB5550B565 from Anatech Electronics is a Band Pass Filter with Frequency 5.54 to 5.56 GHz, Bandwidth 20 MHz, Center Frequency 5550 MHz, Insertion Loss 1.75 dB, Upper Rejection 20 dB 5570-6200 MHz. Tags: Module with Connectors, Cavity Filter. More details for AB5550B565 can be seen below.