The ECA923P6B55BPK from ECHO Microwave is a Band Pass Filter with Frequency 920 to 926 MHz, Insertion Loss 1 dB, Rejection 55 dB @ 500 to 894Mhz, Ripple 0.3 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA923P6B55BPK can be seen below.