The EMA4J1102P10O50D from ECHO Microwave is a Band Pass Filter with Frequency 1.1 to 1.11 GHz, Insertion Loss 7.5 dB, Rejection 50 dB @ 1082 MHz, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4J1102P10O50D can be seen below.