The EMA4D1575P20C35B from ECHO Microwave is a Band Pass Filter with Frequency 1.57 to 1.59 GHz, Insertion Loss 1.3 dB, Rejection 35 dB @ 100 to 1415 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D1575P20C35B can be seen below.