The AB2350B890 from Anatech Electronics is a Band Pass Filter with Frequency 2.3 to 2.4 GHz, Bandwidth 100 MHz, Center Frequency 2350 MHz, Insertion Loss 1.5 dB, Upper Rejection 50 dB @ 2537 MHz. Tags: Module with Connectors, Cavity Filter. More details for AB2350B890 can be seen below.