The EDA4E2780P56I15 from ECHO Microwave is a Band Pass Filter with Frequency 2.75 to 2.81 GHz, Insertion Loss 4.5 dB, Rejection 15 to 60 dB, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4E2780P56I15 can be seen below.