The EMA8F2725P10D40C from ECHO Microwave is a Band Pass Filter with Frequency 2.72 to 2.73 GHz, Insertion Loss 2 dB, Rejection 40 dB @ 2625MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F2725P10D40C can be seen below.