The EMA4D1208P108C40B from ECHO Microwave is a Band Pass Filter with Frequency 1.15 to 1.26 GHz, Insertion Loss 1.5 dB, Rejection 35 to 40 dB, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D1208P108C40B can be seen below.