The BWLF-1R5 from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 1.5 GHz, 3 dB Cutoff Frequency 1.5 GHz, Insertion Loss 1.8 dB @1.5GHz, Rejection 20 dB @2.85GHz, 40 dB @3.7GHz, Power 30 dBm. Tags: Die. More details for BWLF-1R5 can be seen below.