The EMA4D2595P50D40D from ECHO Microwave is a Band Pass Filter with Frequency 2.57 to 2.62 GHz, Insertion Loss 2 dB, Rejection 40 dB @ 2295 MHz, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4D2595P50D40D can be seen below.