The BWHF-4G from Sainty-Tech Communications Limited is a RF High Pass Filter with Frequency 4 to 26 GHz, Insertion Loss 1.7 dB @4.0GHz, Power 30 dBm, Rejection 20 dB @2.6GHz, 40 dB @2.35GHz, Lower Rejection 20 to 40 dB. Tags: Die. More details for BWHF-4G can be seen below.