The EMA8H1900P40F30D from ECHO Microwave is a Band Pass Filter with Frequency 1.88 to 1.92 GHz, Insertion Loss 3 dB, Rejection 30 to 50 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8H1900P40F30D can be seen below.