The SiMF4R6/R4-5D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4.4 to 4.8 GHz, Center Frequency 4.6 GHz, Insertion Loss 3 dB, Rejection 30 dB @3.9GHz&5.15GHz, 40 dB @DC~3.5GHz, 60 dB @6~11GHz, 60 dB @6~10GHz, Upper Rejection 40 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF4R6/R4-5D3 can be seen below.