The EDA6E3972P6N50 from ECHO Microwave is a Band Pass Filter with Frequency 3.97 to 3.88 GHz, Insertion Loss 7 dB, Rejection 50 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA6E3972P6N50 can be seen below.