The ECDA834C879P19C20BM from ECHO Microwave is a Band Pass Filter with Frequency 825 to 889 MHz, Insertion Loss 1 dB, Rejection 20 to 60 dB, Ripple 0.6 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECDA834C879P19C20BM can be seen below.