The ECA942P34K25A from ECHO Microwave is a Band Pass Filter with Frequency 925 to 959 MHz, Insertion Loss 5.4 dB, Rejection 25 dB @ 959.8 to 1000MHz, Ripple 5.4 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA942P34K25A can be seen below.