The BWLF-1G from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 1 GHz, 3 dB Cutoff Frequency 1 GHz, Insertion Loss 1.6 dB @1.0GHz, Rejection 20 dB @1.72GHz, 40 dB @1.95GHz, Power 30 dBm. Tags: Die. More details for BWLF-1G can be seen below.