The SiMF2R7/1-7D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 2.25 to 3.2 GHz, Center Frequency 2.7 GHz, Insertion Loss 3 dB, Rejection 30 dB @1.8GHz&3.8GHz, 40 dB @1.9GHz&3.4GHz, 60 dB @DC~1.3GHz, 60 dB @4.35~7GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF2R7/1-7D2 can be seen below.