The EMEA15F442P1D30B (REV.01) from ECHO Microwave is a Band Pass Filter with Frequency 442 to 442.35 MHz, Insertion Loss 2 dB, Rejection 30 dB @ 436.85 to 437.2MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMEA15F442P1D30B (REV.01) can be seen below.