The SiMS7R8/R4-6D4 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 7.6 to 8 GHz, Center Frequency 7.8 GHz, Insertion Loss 3 dB, Rejection 30 dB @7.2GHz&8.35GHz dB, 40 dB @7.1GHz&8.4GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS7R8/R4-6D4 can be seen below.