The EMA4C1842P75F5B from ECHO Microwave is a Band Pass Filter with Frequency 1.81 to 1.88 GHz, Insertion Loss 3 dB, Rejection 5 to 35 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4C1842P75F5B can be seen below.