The EMA4D2547P110D22D from ECHO Microwave is a Band Pass Filter with Frequency 2.49 to 2.5 GHz, Insertion Loss 1.9 dB, Rejection 22 to 32 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D2547P110D22D can be seen below.