The BWBF-R525/R725 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 0.55 to 0.7 GHz, Center Frequency 0.63 GHz, Insertion Loss [email protected], Rejection =40 dB @0.3&1GHz, Upper Rejection 40 dB. Tags: Surface Mount. More details for BWBF-R525/R725 can be seen below.