The EMA8J2830P100D60D from ECHO Microwave is a Band Pass Filter with Frequency 2.78 to 2.88 GHz, Insertion Loss 2 dB, Rejection 60 dB @ 2680MHz, Return Loss 13 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J2830P100D60D can be seen below.