The EMA8F1504P25D30B from ECHO Microwave is a Band Pass Filter with Frequency 1.49 to 1.52 GHz, Insertion Loss 2 dB, Rejection 30 dB @ 1454.5MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F1504P25D30B can be seen below.