The EMA2B2400P100D40B from ECHO Microwave is a Band Pass Filter with Frequency 2.35 to 2.45 GHz, Insertion Loss 1.8 dB, Rejection 40 dB @ 1900MHz, Return Loss 11 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA2B2400P100D40B can be seen below.