The EDA4F2550P300D40 from ECHO Microwave is a Band Pass Filter with Frequency 2.4 to 2.7 GHz, Insertion Loss 1.8 dB, Rejection 40 dB @ DC to 2050MHz, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4F2550P300D40 can be seen below.