The EMA4E1203P98C8B from ECHO Microwave is a Band Pass Filter with Frequency 1.15 to 1.25 GHz, Insertion Loss 1.5 dB, Rejection 8 to 40 dB, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4E1203P98C8B can be seen below.