The EMA4D2100P130D30D from ECHO Microwave is a Band Pass Filter with Frequency 2.04 to 2.17 GHz, Insertion Loss 2 dB, Rejection 30 to 50 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D2100P130D30D can be seen below.