The BWLF-R5G from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 0.5 GHz, 3 dB Cutoff Frequency 0.5 GHz, Insertion Loss 1.7 dB @0.5GHz, Rejection 20 dB @1.2GHz 40 dB @1.65-6GHz, Power 30 dBm. Tags: Die. More details for BWLF-R5G can be seen below.