The EMA8J2507P15H45D from ECHO Microwave is a Band Pass Filter with Frequency 2.5 to 2.52 GHz, Insertion Loss 4 dB, Rejection 45 dB @ 2457.5MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J2507P15H45D can be seen below.