The EDA4F3050P500F50L from ECHO Microwave is a Band Pass Filter with Frequency 2.8 to 3.3 GHz, Insertion Loss 3 dB, Rejection 50 dB @ 1650MHz, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA4F3050P500F50L can be seen below.