The EDA4E3760P28K30 from ECHO Microwave is a Band Pass Filter with Frequency 3.75 to 3.77 GHz, Insertion Loss 5.5 dB, Rejection 30 to 80 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4E3760P28K30 can be seen below.