The EMEA15F437P1D30B from ECHO Microwave is a Band Pass Filter with Frequency 436.85 to 437.2 MHz, Insertion Loss 2 dB, Rejection 30 dB @ 442 to 442.35MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMEA15F437P1D30B can be seen below.