The BP5900B0805ET from Frontier Electronics is a Band Pass Filter with Frequency 5.15 to 5.85 GHz, Insertion Loss 1.8 dB, Rejection 20 to 40 dB, VSWR 2.00:1, Operating_Temperature -40 to 85 Degree C. Tags: Surface Mount, Ceramic Filter. More details for BP5900B0805ET can be seen below.