The BP2500B0805AT from Frontier Electronics is a Band Pass Filter with Frequency 2.4 to 2.5 GHz, Insertion Loss 2.6 dB, Rejection 16 to 40 dB, VSWR 2.00:1, Operating_Temperature -40 to 85 Degree C. Tags: Surface Mount, Ceramic Filter. More details for BP2500B0805AT can be seen below.