The PDBF-1R4/2R2-8C3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1.45 to 2.15 GHz, Center Frequency 1.8 GHz, Insertion Loss [email protected], Rejection =25 dB @1.2&2.4GHz, Upper Rejection 25 dB. Tags: Surface Mount. More details for PDBF-1R4/2R2-8C3 can be seen below.