The EMA4D2185P30F15B from ECHO Microwave is a Band Pass Filter with Frequency 2.17 to 2.2 GHz, Insertion Loss 3 dB, Rejection 15 to 40 dB, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D2185P30F15B can be seen below.