The BWLF-5 from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 5 GHz, 3 dB Cutoff Frequency 5 GHz, Insertion Loss 1.7 dB @5.0GHz, Rejection 20 dB @8.15GHz, 40 dB @10.5GHz, Power 30 dBm. Tags: Die. More details for BWLF-5 can be seen below.