The ECA884P3J25A from ECHO Microwave is a Band Pass Filter with Frequency 883 to 886.2 MHz, Insertion Loss 10 dB, Rejection 25 dB @ 700 to 882.5MHz, Ripple 5 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA884P3J25A can be seen below.