The SiMF3R3/R2-7D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 3.2 to 3.4 GHz, Center Frequency 3.3 GHz, Insertion Loss 4 dB, Rejection 30 dB @2.9GHz&3.7GHz, 40 dB @2.8GHz&3.85GHz, 60 dB @DC~2GHz, 60 dB @5~8GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF3R3/R2-7D3 can be seen below.