The EDA4F4290P30N40 from ECHO Microwave is a Band Pass Filter with Frequency 4.28 to 4.31 GHz, Insertion Loss 7 dB, Rejection 40 dB @ 4215MHz, Return Loss 14 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4F4290P30N40 can be seen below.