The PDBF-1R4/2R42-16B2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1.45 to 2.4 GHz, Center Frequency 1.83 GHz, Insertion Loss [email protected], Rejection =25 dB @1.1&2.7GHz, Upper Rejection 25 dB. Tags: Surface Mount. More details for PDBF-1R4/2R42-16B2 can be seen below.