The EMA4F4750P700D20D from ECHO Microwave is a Band Pass Filter with Frequency 4.4 to 5.1 GHz, Insertion Loss 2 dB, Rejection 20 to 55 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4F4750P700D20D can be seen below.