The ECA2500P400A40A from ECHO Microwave is a Band Pass Filter with Frequency 2.3 to 2.7 GHz, Insertion Loss 0.4 dB, Rejection 40 dB @ 1000 to 2000MHz, Ripple 0.3 dB, Return Loss 14 dB. Tags: Cavity Filter. More details for ECA2500P400A40A can be seen below.