The SiMS3R3/R5-7D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 3.1 to 3.5 GHz, Center Frequency 3.3 GHz, Insertion Loss 3 dB, Rejection 30 dB @2.74GHz&3.82GHz, 40 dB @2.5GHz&3.9GHz, 60 dB @DC~2GHz, 60 dB @4~10GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS3R3/R5-7D3 can be seen below.