The ECB954F957P1G3F80B from ECHO Microwave is a Band Pass Filter with Frequency 953.85 to 958.45 MHz, Insertion Loss 2.7 dB, Rejection 80. dB @ 957.45 to 958.45MHz, Ripple 1 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECB954F957P1G3F80B can be seen below.