The ECA905P6D55BPK from ECHO Microwave is a Band Pass Filter with Frequency 902 to 908 MHz, Insertion Loss 1.6 dB, Rejection 55 dB @ 500 to 894Mhz, Ripple 0.5 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA905P6D55BPK can be seen below.