The SiMF3R15/R16-4D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 3.07 to 3.23 GHz, Center Frequency 3.15 GHz, Insertion Loss 3 dB, Rejection 30 dB @2.8GHz&3.53GHz, 40 dB @2.6GHz&3.8GHz, 60 dB @DC~2.35GHz, 60 dB @4.15~11.5GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF3R15/R16-4D3 can be seen below.