The EMA4D2132P45D40D from ECHO Microwave is a Band Pass Filter with Frequency 2.11 to 2.16 GHz, Insertion Loss 1.6 dB, Rejection 40 dB @ 1755 MHz, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D2132P45D40D can be seen below.