The SiMF4R7/1-7D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4.25 to 5.15 GHz, Center Frequency 4.7 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @3.65GHz&5.7GHz, 40 dB @3.5GHz&5.8GHz, 60 dB @DC~3GHz, =60 dB @5.9~12GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF4R7/1-7D2 can be seen below.