The EMA8J1688P108E20D from ECHO Microwave is a Band Pass Filter with Frequency 1.63 to 1.74 GHz, Insertion Loss 2.5 dB, Rejection 20 to 40 dB, Return Loss 16 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J1688P108E20D can be seen below.