The EMA4D3350P100D40B from ECHO Microwave is a Band Pass Filter with Frequency 3.3 to 3.4 GHz, Insertion Loss 2 dB, Rejection 40 dB @ 2650MHz, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D3350P100D40B can be seen below.