The EMA8J1000P100D40D from ECHO Microwave is a Band Pass Filter with Frequency 950 MHz to 1.05 GHz, Insertion Loss 2 dB, Rejection 40 dB @ 900MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J1000P100D40D can be seen below.