The SiMS5/R4-7D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4.9 to 5.2 GHz, Center Frequency 5.05 GHz, Insertion Loss 2 dB, Rejection 30 dB @4.5GHz&5.75GHz, 40 dB @3.4GHz&6.3GHz dB, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS5/R4-7D3 can be seen below.