The EMA6F1379P90C35D from ECHO Microwave is a Band Pass Filter with Frequency 1.33 to 1.42 GHz, Insertion Loss 1.5 dB, Rejection 35 dB @ 1283.9 MHz, Return Loss 13 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA6F1379P90C35D can be seen below.