The EMA8J2900P400H60DL from ECHO Microwave is a Band Pass Filter with Frequency 2.7 to 3.1 GHz, Insertion Loss 4 dB, Rejection 50 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J2900P400H60DL can be seen below.