The PDLF-2R8G from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 2.8 GHz, 3 dB Cutoff Frequency 2.8 GHz, Insertion Loss 1.8 dB @2.8GHz, Rejection 20 dB @3.25GHz, 40 dB @3.5GHz, Power 30 dBm. Tags: Die. More details for PDLF-2R8G can be seen below.