The EMA8F1227F1575B25D from ECHO Microwave is a Band Pass Filter with Frequency 1.57 to 1.59 GHz, Insertion Loss 0.9 dB, Rejection 25 dB @ 1037 to 1067 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F1227F1575B25D can be seen below.