The AM2250B1283 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 2.0 dB, Upper Rejection 28dB @ 1638-1880 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM2250B1283 can be seen below.