The EMA8J1200P100E35DL from ECHO Microwave is a Band Pass Filter with Frequency 1.15 to 1.25 GHz, Insertion Loss 2.5 dB, Rejection 35 to 60 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J1200P100E35DL can be seen below.