The EMA4D2132P45E25B from ECHO Microwave is a Band Pass Filter with Frequency 2.11 to 2.16 GHz, Insertion Loss 2.5 dB, Rejection 25 dB @ 1995 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D2132P45E25B can be seen below.