The EMA8F860P18E40D from ECHO Microwave is a Band Pass Filter with Frequency 851 to 869 MHz, Insertion Loss 2.5 dB, Rejection 40 dB @ 806 to 824 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F860P18E40D can be seen below.