The EMA15L1840P80E20D from ECHO Microwave is a Band Pass Filter with Frequency 1.8 to 1.88 GHz, Insertion Loss 2.5 dB, Rejection 20 to 45 dB, Return Loss 16 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA15L1840P80E20D can be seen below.