The EDA4C1090P20E38 from ECHO Microwave is a Band Pass Filter with Frequency 1.08 to 1.1 GHz, Insertion Loss 2.5 dB, Rejection 38 to 62 dB, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4C1090P20E38 can be seen below.