The EMA8J2820P60I55DL from ECHO Microwave is a Band Pass Filter with Frequency 2.79 to 2.85 GHz, Insertion Loss 4.5 dB, Rejection 55 dB @2700MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J2820P60I55DL can be seen below.