The BWBF-1R3/2R3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1.35 to 2.25 GHz, Center Frequency 1.8 GHz, Insertion Loss [email protected], Rejection =35 dB @0.85GHz, =20 dB @2.75GHz, Upper Rejection 20 dB. Tags: Surface Mount. More details for BWBF-1R3/2R3 can be seen below.