The EMA4D1575P2C45D from ECHO Microwave is a Band Pass Filter with Frequency 1.57 to 1.58 GHz, Insertion Loss 1.2 dB, Rejection 45 dB @ DC to 1260 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D1575P2C45D can be seen below.