The EDA4E3750P20F40 from ECHO Microwave is a Band Pass Filter with Frequency 3.74 to 3.76 GHz, Insertion Loss 3 dB, Rejection 40 dB @ DC to 3400 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4E3750P20F40 can be seen below.