The EMA15F947P25C40D from ECHO Microwave is a Band Pass Filter with Frequency 935 to 960 MHz, Insertion Loss 1.5 dB, Rejection 40 dB @ 890 to 915 MHz, Return Loss 18 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA15F947P25C40D can be seen below.