The EDA4F1200P20F50 from ECHO Microwave is a Band Pass Filter with Frequency 1.19 to 1.21 GHz, Insertion Loss 3 dB, Rejection 50 dB @ 1140MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4F1200P20F50 can be seen below.