The EMA4D1677P115C15D from ECHO Microwave is a Band Pass Filter with Frequency 1.62 to 1.74 GHz, Insertion Loss 1.4 dB, Rejection 15 to 48 dB, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D1677P115C15D can be seen below.