The PDBF-R38/R58-4C2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 0.4 to 0.55 GHz, Center Frequency 0.48 GHz, Insertion Loss [email protected], Rejection =35 dB @200MHz &800MHz, Upper Rejection 35 dB. Tags: Surface Mount. More details for PDBF-R38/R58-4C2 can be seen below.