The AM2250B558 from Anatech Electronics is a Band Pass Filter with Frequency 2.2 to 2.3 GHz, Bandwidth 100 MHz, Center Frequency 2250 MHz, Insertion Loss 2 dB, Lower Rejection 18dB @ 2100 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM2250B558 can be seen below.